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Commercial ice machine slime and mold

Updated 2026-10-20. Independent guide — not a dealer quote.

Pink, black, or brown film in the bin, on the curtain, or in the water trough is a food-zone problem. Ice that goes into a glass is food. This page is an owner checklist from public manufacturer manuals, current accessory pages, and one CDC report we opened on 2026-10-20. It is not a service procedure, not a species identification, not an ounces-per-gallon recipe, and not a health-code letter.

Follow that model’s current manual, and follow your local health department’s rules. This site does not say what any code requires.

Cleaner-versus-sanitizer intervals, and the long brand-by-brand floor table, stay on how to clean a commercial ice machine. Cartridge ratings stay on water filters and descalers. Musty or off-tasting ice with no visible film stays on cloudy or bad-tasting ice. A machine that also stopped dropping ice stays on not making ice. A scaled evaporator that has become a replacement stays on repair vs replace. A bakery room and a brewery taproom are ice machine for a bakery and ice machine for a brewery. A bar’s ice choice stays on ice machine for a bar. A chute versus an open bin stays on ice dispenser vs ice bin.

Read the data plate, then that model’s current manual. A sibling cabinet can print a different interval and a different chemical charge. We do not invent a VenueIce average.

What the film usually is

The sheets we opened do not print a color chart that assigns pink to one organism, black to another, and brown to a third. Color is not a lab result. Treat any slippery film in the ice path as something to discard the ice for, then clean and sanitize with the products that manual names.

What those sources do name:

Source we opened Words it uses What we are not adding
Manitowoc sanitation sell sheet (filename 0420) “Biofilm” is “bacteria, algae, fungi, mold, and worst of all, viruses” that “will find themselves at home in your ice machine without proper cleaning and sanitation.” A species name. A color.
ACHR News, 29 Jul 2020, quoting Manitowoc’s Murray Meyer If the machine is not regularly sanitized, “biofilm can grow — and in some cases show up as black specks on the ice.” “Cold, damp environments are ideal locations for bacteria to grow.” A claim that every black speck is the same organism.
Manitowoc owner-manual line already quoted on the cloudy-ice page from the undercounter book, part 040005890, Rev 07, 08/22 Sanitizer “disinfects and removes algae and slime.” De-scaler removes lime scale and mineral deposits. We did not re-open that PDF on 2026-10-20. A house mix. The part numbers on that page stay on that page.
Ice-O-Matic Elevation Series CIM installation manual, part 9081484-01 Rev. V, 8/2024 “Sanitizing disinfects the machine and removes microbial growth including mold and slime.” The same water section says reverse-osmosis water “can promote the faster growth of microbial mold and slime” because the process removes minerals and metals. A promise that minerals prevent mold. The pH 7.0 line on that page is a warranty check when RO is already in use. It is already on the cloudy-ice page.
Scotsman AquaDefense page (AquaPatrol Plus & SSM Plus), opened 2026-10-20 AquaBullet media is “custom designed to inhibit the growth of a wide variety of mold, bacteria and algae that cause slime.” AquaArmor / AgION is described as inhibiting mold, bacteria, and algae. A claim that the wand identifies which of those three you have.
CDC MMWR, 3 Oct 2024 “Ice machines contain several mechanical components that can favor microbial amplification and biofilm formation.” The report is a hospital outbreak of Burkholderia multivorans tied to ice and water used for patient-care activities. A cafe diagnosis. We are not saying a pink film in a bar bin is that organism, and we are not giving clinical advice.

A hard white or tan crust on the evaporator or the water distributor is the scale the descaler is for. Meyer’s same interview separates that job from sanitizing: skipped descaling fails harvest and scales water paths; skipped sanitizing is the biofilm sentence. Slippery film and hard crust can be in the same machine. They are still two chemicals.

Uncertain — color. We did not find a Manitowoc, Hoshizaki, Scotsman, or Ice-O-Matic page that says pink film is one named microbe and brown film is another. A 9 Apr 2025 Reno Gazette Journal interview with Robert Fyda of Northern Nevada Public Health describes pink buildup as a bacterial colony or biofilm, often mistaken for mold, and black buildup as typically mold. That is one official’s description of what inspectors see. It is not a culture of your machine. We are not using it as a species key.

Where it builds up

These are the food-zone parts the books we opened tell you to clean. They are not a ranked list of “most likely” spots, and they are not permission to pull a panel the manual assigns to a technician.

Place owners look What the opened book actually names Which book
Bin Discard all ice, then clean and sanitize the interior. Door liner, door gasket, and door frame are the weekly row. The entire interior is the semi-annual row. “The bin should always be cleaned and sanitized when the ice machine is.” Scotsman ice-storage-bin sheet, file 17303901
Bin liner, water tank, cube guides The clean removes the water tank and cube guides and washes the bin liner. The bin is ice use only. Hoshizaki KM-81 / 116 / 161 B_K instruction, issued 5-7-2025. KM-81BAK is the current directory cabinet in that book.
Evaporator, curtain, spillway, distributor Wipe the evaporator, water spillway, water distributor, upper evaporator cover, lower evaporator curtain, and splash surfaces. Then clean the storage means. Ice-O-Matic CIM manual, Rev. V, 8/2024
Curtain, distributor, reservoir, freezing compartment The clean removes the curtain and washes the water distributor, curtain, sensors, and freezing-compartment surfaces, then the bin. Curtains have to be closed before the clean button runs. Scotsman Prodigy Plus E user manual, form 17-3599-01 Rev. A, which lists C0330 among the models. C0330MA-1 is the directory head in that family.
Water trough Meyer (ACHR, 2020): owners can run remedial descaler and sanitizer cycles “in the water trough” between deep cleans. A deep clean is how you reach parts water does not touch. ACHR interview. It is not a trough diagram for every brand. Scotsman’s book says reservoir. Ice-O-Matic’s book says sump.
Door gasket Weekly clean and sanitize of the door gasket, liner, and frame. More often “in certain environments.” Scotsman bin sheet 17303901. Meyer (same ACHR article) also describes a thick rubber gasket on Indigo NXT food-zone panels “to keep out contaminants.” That gasket sentence is the 2020 interview. We did not re-open an Indigo NXT installation book today.
Drain KM-81-class instruction: follow the clean so the ice storage bin drain stays clear. If water collects in the bin and will not drain, turn the icemaker off, close the supply, and call for service. Scotsman Prodigy planned-maintenance sheet: flush the bin drain with hot water as part of the sanitize. Hoshizaki instruction issued 5-7-2025; Scotsman sheet 291-856 Rev B
Dispenser chute or spout We did not open a sentence that says “slime grows in the chute” as a diagnosis. Scotsman’s current XSafe page says the treated air “also travels into the bin.” The cleaning guide already says Hoshizaki flaker and DCM procedures remove spouts and related food-zone parts. We did not re-open the DCM instruction today. Ice dispenser vs ice bin is the chute-versus-scoop choice. A slimy spout whose next step is parts removal is the tech line below.

Why it shows up

The manuals give conditions, not one growth rate.

  • Airborne yeast, sugar, flour, and grease. Meyer (ACHR, 2020): if the environment has yeast, sugar, and/or flour in the air, sanitize more often. Hoshizaki’s Rodd Burger, in the same article: worse water, or grease or flour, changes frequency. Scotsman Prodigy Plus E user manual (the C0330-class book): installing a machine near a source of yeast or similar material can mean more frequent sanitation cleanings, because those materials contaminate the machine. A bakery and a brewery taproom are the venue pages linked above. A bar is the same yeast-and-sugar case when the machine sits in that air. We are not printing a separate “bakery months” number.
  • The food zone is cold and damp. Meyer’s line is “cold, damp,” not a room-temperature chart. We did not find a shared OEM sentence that says a warm humid kitchen grows slime by a stated amount. Ambient limits on the install sheets are production limits. They are already on not making ice.
  • Infrequent cleaning, and idle machines with standing water. Scotsman’s C0330-class manual: “Without human intervention, sanitation will not be maintained.” Burger (ACHR): if a shutdown leaves standing water, mold and bacteria can grow, and the machine needs a clean and sanitize before customer ice. The same article’s Hoshizaki startup list includes discarding the first ice. The cleaning page already carries that startup list.
  • Scale is a different buildup that often shares the calendar. High minerals shorten the descale interval (Meyer; Scotsman planned maintenance: some sites need more than twice a year). Scale is not the definition of slime. Ice-O-Matic’s RO sentence points the other way: water with the minerals stripped out can grow mold and slime faster. We are not merging those into “scale feeds slime” or “soft water prevents slime.”
  • A chlorine-removing filter can make a yeast-room problem worse, on the Scotsman book that says so. The same Prodigy Plus E manual says most water filters remove chlorine, “which contributes to this situation,” and that Scotsman’s testing found a filter that does not remove chlorine, “such as the Scotsman Aqua Patrol,” greatly improved it, with the ice-making process removing chlorine from the ice. That sentence is airborne contamination on those heads. It is not a ban on a carbon cartridge for a cuber whose ice tastes like a pool. The current AquaPatrol Plus page we opened describes dirt, rust, and phosphate. It does not reprint the “does not remove chlorine” sentence. If you are buying a filter for the yeast case, confirm the current AquaPatrol sheet. The filters page is the cartridge page. A filter change is not a sanitize.

Cleaner and sanitizer are two steps

Use the products the manual for that data plate names. Do not mix them. Do not copy a dilution from a different model.

Book opened for this page Cleaner / descaler Sanitizer Order
Ice-O-Matic CIM, 9081484-01 Rev. V, 8/2024 Descaling dissolves mineral deposits. The book requires a nickel-safe cleaner “such as Nu-Calgon Nickel-Safe Ice Machine Cleaner or equivalent,” diluted per the chemical maker. For CIM revision 4 and higher it also allows KAY Delimer. Sanitizing removes microbial growth including mold and slime. The book requires a nickel-safe sanitizer “such as Nu-Calgon IMS-III or equivalent,” diluted per the chemical maker. Sanitize after each descale. Do not mix the two. Eye protection and rubber gloves are in the caution.
Scotsman Prodigy Plus E, 17-3599-01 Rev. A (includes C0330) Scale remover for mineral buildup. The book names Scotsman Clear 1 and prints different charges for a C0330 than for larger heads in the same manual. An EPA-approved food-equipment sanitizer at the mix the sanitizer manufacturer recommends. The book also names Scotsman Stera Sheen Green Label, part 14-0382-01, and says to use a locally approved sanitizer. The water system is cleaned and sanitized. The bin is sanitized every time the machine is. We are not reprinting the ounce line.
Hoshizaki KM-81 / 116 / 161 B_K instruction, issued 5-7-2025 The cleaning section names Hoshizaki Scale Away and prints a dilution for that procedure. The sanitizing section names chlorine bleach and tells you to confirm the concentration. The same section prints two sodium-hypochlorite percentages. We are not choosing one and we are not copying either mix here. Clean, then sanitize. The maintenance chapter also says only qualified service technicians should service the appliance.
Manitowoc, via the undercounter sentence already on the cloudy-ice page, plus the sanitation sell sheet Cleaner removes lime scale or other mineral deposits. Sanitizer removes algae or slime. The sell sheet says to use Manitowoc cleaner and sanitizer as directed. The cleaning page’s Manitowoc manuals say do not mix the two. We did not re-open those PDFs today.

Discard the ice the procedure tells you to discard. Scotsman’s bin sheet starts with “Remove and discard all ice.” Ice-O-Matic’s CIM clean starts by removing all ice from storage. Do not rinse filmed ice and put it back in the bin.

Ounces, cycle minutes, and which panels come off stay in the manual that matches the serial. The cleaning guide already explains why a KM bleach line is not a NEO line.

How often the manufacturers say to do it

These floors are the documents named in the cell. They are not one commercial-ice-machine interval. If the machine is dirtier than the floor, the same documents say to clean more often. They do not say the accessory in the next section cancels the floor.

Family Published floor we can cite Shorter interval, on that source
Manitowoc Meyer, ACHR 2020: detailed descaling and sanitizing twice per year at a minimum. The owner-manual six-month lines (S-series, Indigo NXT, NEO undercounter) are collected on the cleaning guide. We did not re-open those three PDFs today. Meyer’s “deep cleaning once a year” sentence, for parts water does not touch, sits beside the twice-a-year line. The cleaning page shows both and does not pick one. High minerals: descale more often. Yeast, sugar, and/or flour in the air: sanitize more often.
Hoshizaki cubers, including the KM-81 class KM-81 / 116 / 161 B_K instruction, issued 5-7-2025: cleaned and sanitized at least once a year. Burger, ACHR 2020: cuber products, annual. “More frequent cleaning and sanitizing may be required in some water conditions.” The maintenance schedule on that instruction is a guideline and “may be required” more often depending on water quality, the environment, and local sanitation regulations. We are not stating what a regulation requires.
Hoshizaki flakers and DCM Burger, ACHR 2020: every six months at a minimum. The F-330BAJ and DCM instruction floors are on the cleaning page. We did not re-open those PDFs today. F-330BAK is the directory flaker. Grease, flour, or worse water, in Burger’s interview.
Scotsman Prodigy Plus cubers, including C0330MA-1 User manual 17-3599-01: water system cleaned and sanitized a minimum of twice per year. Sheet 291-856 Rev B: remove scale and change filters a minimum of every 6 months; sanitize whenever scale is removed. Significant minerals: more than twice per year. Yeast nearby: more frequent sanitation, in the user manual. Bin sheet 17303901: weekly gasket and frame; semi-annual full interior; more often in some locations; always when the machine is cleaned. The user manual also says to sanitize the bin as frequently as local health codes require. That is the book pointing you at the health department. It is not our reading of a code.
Scotsman CU50 The cleaning guide quotes the CU50 user manual: at least once a year, preferably twice, with a Time to Clean light at six months. We did not re-open that PDF today. CU50 is a different family from the C0330 manual above. Bad water, on that CU50 sentence as already quoted on the cleaning page.
Ice-O-Matic CIM Rev. V, 8/2024: descale at a minimum of twice per year but no more than once per month. Sanitize after each descale, and no more than once per month. The “no more than once per month” line is a ceiling on this book. It is not a Hoshizaki or Manitowoc ceiling. We did not find that ceiling on the other three brands’ sheets.

What does not replace that clean

  • A water filter. The filters page already says a cartridge is not a sterilizer and not a clean cycle. Scotsman’s yeast paragraph above is the one case where the type of filter matters. It still does not sanitize a curtain.
  • An automatic purge. F-330BAK CleanCycle24 and the CU50 water-quality sensor are already flagged on the cleaning page. A short flush or a mineral purge is not the descale-and-sanitize procedure.
  • Manitowoc iAuCS, on the sanitation sell sheet: an automatic de-scaler. The sheet’s own biofilm sentence is the cleaner and sanitizer, not the de-scale device alone. We did not open a current model page that says a directory cabinet ships with iAuCS.
  • UV, ozone, and antimicrobial plastic, in the next section. Several of those pages say cleanings can be less frequent. The user manuals above still print a floor. Scotsman’s C0330-class line is the blunt one: without human intervention, sanitation will not be maintained. Burger’s 2020 line on Hoshizaki’s ozone device: nothing replaces cleaning and sanitizing.

Antimicrobial and ozone options the current pages document

Only the sentences on the page we opened. A kit number is not a statement that a directory cabinet includes the kit.

Offering What the current document says Boundary
Manitowoc LuminIce II Spec sheet asset lcthx, footer 4897G 6/26. Uses 254 nm UVC and 185 nm UVV light to make cold oxygen plasma. “Reduced Yeast and Bacteria Growth” by independent lab testing. “Easier Cleaning — reduced slime build up speeds the regularly scheduled cleaning process.” Runs whether or not the machine is making ice. Bulb change once a year. Foodservice rooms are described as places where yeast, mold, and other microorganisms are hard to keep out. Factory-installed units add an X to the Indigo NXT model number on selected models. The same sheet uses both “suffix” and “prefix” for that X. We are not choosing one. Kit K00464 lists small-medium Indigo NXT models including IT0450. Kit K00519 is for NEO undercounters UF0140 to UF0310. “Regularly scheduled cleaning” is still in the sentence. The six-month owner-manual floor is unchanged by this sheet. IYT0450A is an Indigo NXT head in the IT0450 size class. UYF-0140A and UYF-0190A are NEO undercounters in the UF0140–UF0310 size class. We did not open a cut sheet that prints LuminIce as standard equipment on those three model strings. Uncertain for a given serial until the data plate or the order shows the X or the kit.
Manitowoc Alpha-San Meyer, ACHR 2020: Indigo NXT internal parts treated with Alpha-San to inhibit bacteria. We did not find Alpha-San on the 6/26 LuminIce spec or on the sanitation sell sheet we opened. Uncertain whether current Indigo NXT production still uses it.
Scotsman XSafe, model XR-30 Current product page. UVGI light makes a reactive oxygen mixture circulated through the food zone and into the bin. “Helps prevent the formation of slime, mold, and yeast.” “Frequency of cleanings can be reduced.” “Chemical-free cleaning system.” Retrofit, with the page’s dimensions 11.9″ × 4.25″ × 2.05″. The XSafe presentation (filename 0625; no issue date in the text we extracted) calls it a field retrofit for any Scotsman modular ice machine and says ozone and other oxidants are generated in the air. The C0330-class user manual still says twice a year minimum. We are not treating “can be reduced” as a new floor. The page also says it “guards against health code infractions.” That is the manufacturer’s marketing sentence. We are not saying an inspector will accept it.
Scotsman AquaArmor with AgION Prodigy Plus brochure: AquaArmor, using AgION, “is molded directly into key internal components to protect your machine between cleanings.” Current AquaDefense page: controlled release “for the life of the machine,” inhibiting mold, bacteria, and algae. C0330 spec sheet SIS-SS-PP-C0330 (portal file dated 0122 in the name): “Antimicrobial protection guards internal surfaces between cleanings.” “Between cleanings” means the clean still happens. The brochure does not print the AgION claim on a single SKU line for C0330MA-1. The spec sheet’s line is “antimicrobial protection,” not the word AgION. Uncertain only if a newer C0330 cut sheet drops the line. The 0122 sheet and the brochure still say it for this platform.
Scotsman AquaBullet Current AquaDefense page: EPA-registered antimicrobial media in a drop-in for the sump of cube machines, aimed at mold, bacteria, and algae that cause slime. The C0330-class user manual also names Aqua Bullet as a device that can be placed in the machine to keep it cleaner between manual cleanings. We did not open the EPA label. Between cleanings, again, is not a skipped clean.
Ice-O-Matic PURE ICE Current product pages for CIM0320FA, CIM0636FA, and CIM0436HW print “PURE ICE® built-in antimicrobial protection” in the product description, next to one-touch sanitize/descaling controls. The 2025 CIM0430 / 0436 / 0435 spec reprint cited on CIM0430A did not contain the words PURE ICE or antimicrobial when we searched the text on 2026-10-20. Uncertain whether that directory head includes PURE ICE. Confirm the current Ice-O-Matic page for the exact suffix on the data plate.
Ice-O-Matic SafeIce The same CIM manual, Rev. V 8/2024, includes SafeIce bulb maintenance: clean the bulb every three months in a dusty or smoky area, and change it at least every twelve months. The manual says SafeIce complies with FCC Part 15, and that “the health aspects associated with the use of SafeIce and its ability to aid in disinfection of environment air have not been investigated by UL.” iceomatic.com/Safeice returned 404 on 2026-10-20. Uncertain whether SafeIce is still a current catalog accessory. The manual still documents the bulb.
Ice-O-Matic O3-Matic A 27 Jan 2017 Ali Group news post describes an ozone device for modular cube makers and says it does not eliminate regular cleaning. We did not find a current Ice-O-Matic product page for O3-Matic on 2026-10-20. We are not describing it as a current offering.
Hoshizaki HS-5767 Clean Ice Ozone System Current product page (image path dated 2026/01). Treats incoming water “to reduce bacteria, yeast, mold, and biofilm buildup — extending the time between cleanings.” Nitrogen-free ozone. Cartridge lifetime on that page: 6–12 months. The page says modes support up to 2,600 lbs of ice production. That is the accessory page’s application line, not a production rating for a directory head. Burger, ACHR 2020, on Hoshizaki’s ozone generator: it inhibits growth on surfaces the water touches, including lines and the drain, and nothing replaces cleaning and sanitizing. We show both sentences. “Extending the time” is not a new published floor.
Hoshizaki H-GUARD Plus Current pages for dispensers DB-130H and DB-200H: “Protected by H-GUARD Plus Antimicrobial Agent.” Color spec KM-350/520/660M_J, dated 09/21/22: “Protected by H-GUARD Plus Antimicrobial Agent,” which includes the KM-520MAJ row. The current KM-520MAJ HTML product page, opened 2026-10-20, does not print H-GUARD. The KM-81/116BAK color spec dated 05/20/26 does not print it either. Uncertain on a KM-520MAJ built after that 2022 spec. Confirm the sheet that matches the serial. We are not calling H-GUARD a sanitizer.

What you can check before calling

Do these without opening a control box and without a chemical the manual does not name.

  1. Say whether it is slippery film, a hard crust, or black specks in the ice. Film and specks are the sanitizer side of the table above. A hard crust is the descaler side, and a failed harvest is also the not-making-ice page. Musty smell without a film you can see is the cloudy-ice page.
  2. Say where. Bin wall, door gasket, curtain, trough or reservoir, drain, or a dispenser spout. Use the location table. Do not take the water tank out unless that model’s owner procedure tells you to and you are equipped for it.
  3. Stop serving the ice that was touching the film. The bin procedures we opened start by removing and discarding the ice.
  4. Check the last full clean against the floor for that brand, then shorten it if the room is a bakery, brewery, pizzeria, or bar with yeast, sugar, or flour in the air. Write down the date. A filter change on the same day is a second job, not this job.
  5. Use the cleaner and the sanitizer the manual names, in that order, if you are going to do the clean yourself and you have that book. If you do not have the book or the named products, stop.
  6. Look at the bin drain. Standing water in the bin with a slimy drain is the Hoshizaki “will not drain / call for service” line when the cabinet is that style. Water on the floor belongs on leaking water.

When to call a technician

  • The manual’s next step is parts removal you are not set up for: water tank, spray tubes, evaporator curtain on a head that is not the owner-level clean, or a dispenser spout. Hoshizaki’s KM-81-class maintenance warning says only qualified service technicians should service the appliance. Burger (ACHR) recommends a professional for the thorough clean. Manitowoc’s extremely-dirty line — take the machine apart — is on the cleaning page.
  • The bin drain will not clear after you have done the clean that book allows. The KM-81-class instruction says to shut the machine off, close the water supply, and call for service.
  • Harvest is still failing after one proper descale and sanitize. That is not making ice and, if the plate is ruined, repair vs replace. More acid is not the next step.
  • The film is back within weeks in a room that is not a yeast room, after a clean that followed the manual. Ask a qualified company to test the water, which is the Manitowoc line when the machine needs cleaning more often. We are not listing a DIY titration.
  • You do not have the manual that matches the data plate. A CIM monthly ceiling is not a KM-81 annual floor. A C0330 charge is not a CU50 charge.
  • Ice or water from the machine is being used for patient care. That is the CDC report’s setting, not this cafe checklist. Follow the facility’s rules and the health department. This page does not interpret them.

Tell the tech the model, the serial, the color and location of the film, the last clean date, the chemicals used, whether the room has yeast or flour in the air, and whether a softener or RO unit feeds the machine. That is the useful call.

What this page is not

  • Not a service recipe. No ounce table, no bleach ratio, no “hold Clean for N seconds” that pretends to cover every control board.
  • Not a species report. Pink, black, and brown are not identified organisms on the manufacturer sheets we opened.
  • Not the cleaning-interval page. The long Manitowoc / Hoshizaki / Scotsman table stays on how to clean. Ice-O-Matic’s twice-a-year and once-a-month lines are here because that page does not carry them.
  • Not the filter page. NSF ratings and gallon capacities stay on filters and descalers.
  • Not a health-code or legal opinion. Follow the model manual and your local health department. NSF listings and the installation manual are what you show an inspector. We do not say a schedule or an accessory “meets” a code.
  • Not a review and not a price. No scores, no invented cleanings, no kit prices.

Sources

  1. Manitowoc, sanitation sell sheet (filename 0420) — LuminIce II described as UV plus photo plasma; iAuCS as an automatic de-scaler; biofilm as bacteria, algae, fungi, mold, and viruses; Manitowoc cleaner and sanitizer when used as directed (retrieved 2026-10-20).
  2. Manitowoc, LuminIce II spec sheet, footer 4897G 6/26, and the LuminIce II product page — 254 nm and 185 nm, yeast and bacteria, reduced slime and regularly scheduled cleaning, annual bulb, factory X on selected Indigo NXT models, kits K00464 (includes IT0450) and K00519 (NEO UF0140–UF0310). The sheet uses both “prefix” and “suffix” for the X (retrieved 2026-10-20).
  3. ACHR News, Joanna R. Turpin, Ice Machine Maintenance Means Regular Cleaning and Sanitizing (29 Jul 2020) — Meyer: twice-a-year detailed descale and sanitize; minerals versus yeast/sugar/flour; cold damp environments; biofilm and black specks; water-trough remedial cycles; LuminIce II wavelengths; Alpha-San on Indigo NXT parts; food-zone gasket. Burger: flaker/DCM every six months, cubers annual, grease or flour, standing water after a shutdown, ozone does not replace cleaning, thorough cleaning left to a professional (retrieved 2026-10-20). Secondary citation.
  4. Ice-O-Matic, Elevation Series CIM installation manual, part 9081484-01 Rev. V, 8/2024 — mold and slime from RO water; descale at least twice a year and no more than monthly; sanitize after descale, no more than monthly; nickel-safe cleaner and sanitizer examples; do not mix; curtain, evaporator, spillway, distributor; SafeIce bulb interval and the UL disclaimer (retrieved 2026-10-20).
  5. Ice-O-Matic current product pages that print PURE ICE built-in antimicrobial protection: CIM0320FA, CIM0636FA, CIM0436HW (retrieved 2026-10-20). The 2025 CIM0430/0436/0435 spec reprint used on the CIM0430A directory page did not contain those words in the text we searched.
  6. Scotsman, Prodigy Plus E series user manual, form 17-3599-01 Rev. A (C0322 through C1030, including C0330) — yeast and Aqua Patrol; twice-a-year minimum; sanitation is not maintained without human intervention; curtain, reservoir, bin; Clear 1 charges differ by model; Stera Sheen Green Label 14-0382-01; Aqua Bullet between manual cleanings. No issue date was in the text we extracted (retrieved 2026-10-20).
  7. Scotsman, Prodigy Plus planned maintenance, 291-856 Rev B — scale removal at least every 6 months; sanitize when scale is removed; curtain, distributor, spillway; flush the bin drain (retrieved 2026-10-20).
  8. Scotsman, ice storage bin cleaning sheet, file 17303901 — weekly door liner, gasket, and frame; semi-annual interior; discard all ice; more often in some locations (retrieved 2026-10-20).
  9. Scotsman, XR-30 XSafe product page and XSafe product presentation (filename 0625) — UVGI, reactive oxygen / ozone, slime, mold, and yeast, bin coverage, cleanings “can be reduced” (retrieved 2026-10-20).
  10. Scotsman, AquaPatrol Plus and SSM Plus page — AquaBullet, AquaArmor / AgION, and the AquaPatrol description we compared with the user manual (retrieved 2026-10-20). Prodigy Plus brochure — AquaArmor molded into key components between cleanings. C0330 spec sheet — “Antimicrobial protection guards internal surfaces between cleanings.”
  11. Hoshizaki, KM-81 / 116 / 161 B_K instruction manual, issued 5-7-2025 — at least once a year; bin drain; ice-only bin; Scale Away and a model-specific sanitizer section with two bleach percentages we are not reprinting; qualified-technician warning (retrieved 2026-10-20). KM-81/116BAK color spec, dated 05/20/26 — no H-GUARD line in the text we read.
  12. Hoshizaki, KM-520MAJ product page — no H-GUARD line on the HTML we opened. KM-350/520/660M_J color spec, dated 09/21/22 — “Protected by H-GUARD Plus Antimicrobial Agent.” DB-130H and DB-200H current pages still print that agent (retrieved 2026-10-20).
  13. Hoshizaki, HS-5767 product page — ozone system, bacteria, yeast, mold, and biofilm, cartridge life 6–12 months, up to 2,600 lb application line (retrieved 2026-10-20).
  14. CDC, MMWR 3 Oct 2024 — ice-machine components can favor biofilm; hospital B. multivorans infections linked to ice and water used for patient care. Not a foodservice species key (retrieved 2026-10-20).
  15. Reno Gazette Journal, 9 Apr 2025 — interview with Robert Fyda, Northern Nevada Public Health, on pink film versus black growth. Secondary. Not a laboratory identification (retrieved 2026-10-20).
  16. Ali Group, 27 Jan 2017 O3-Matic announcement — historical only. No current Ice-O-Matic product page found on 2026-10-20. https://www.iceomatic.com/Safeice returned 404 the same day.
  17. Existing VenueIce pages this article points at instead of repeating: how to clean, filters and descalers, cloudy or bad-tasting ice, not making ice, repair vs replace, bakery, brewery, bar, dispenser vs bin, leaking water. Directory cabinets named above: C0330MA-1, CIM0430A, KM-520MAJ, KM-81BAK, IYT0450A, UYF-0140A, UYF-0190A, F-330BAK, CU50.

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