Ice absorbs odors and flavors from everything around it. If your ice tastes off, smells funky, or the machine produces smaller cubes than it used to, mineral scale and biofilm are almost certainly the cause. Knowing how to clean ice maker units properly takes 20-30 minutes and should happen every 3-6 months depending on your water quality. Here is the complete process for refrigerator, countertop, and built-in ice makers.
Signs Your Ice Maker Needs Cleaning
Most people wait until ice tastes bad before cleaning, but earlier warning signs can save you from serving guests cloudy, off-flavored cubes:
- Cloudy or white ice instead of clear cubes
- Smaller cubes than normal (mineral buildup restricts water flow)
- Pink, black, or slimy residue inside the bin or on components
- Musty or metallic taste in the ice
- Slower production — the machine takes longer to complete a cycle
Pink or black residue is particularly important to address quickly. The pink tint comes from Serratia marcescens or Aureobasidium bacteria, which thrive in cool, moist environments. While generally not dangerous, they indicate conditions where more harmful organisms could also grow.
Cleaning a Refrigerator Ice Maker
Most side-by-side and French door refrigerators have a built-in ice maker in the freezer compartment. Cleaning it requires accessing the ice bin and the components behind it.
- Turn off the ice maker using the on/off switch (usually a small arm or toggle inside the freezer)
- Remove the ice bin by pulling it straight out — most slide on rails
- Dump all existing ice and wash the bin with warm water and a tablespoon of baking soda. Do not use soap, which can leave residue that affects ice taste
- Wipe the ice maker assembly (the ejector arms, fill tube, and surrounding area) with a cloth dampened in a 50/50 white vinegar and water solution
- For mineral buildup on the fill tube, wrap a vinegar-soaked cloth around it for 10 minutes, then wipe clean
- Dry all components completely, replace the bin, and turn the ice maker back on
- Discard the first two batches of ice produced after cleaning
Cleaning a Countertop Ice Maker
Portable countertop ice makers (Frigidaire, NewAir, Igloo, and similar brands) are easier to clean because all components are accessible. Most have a self-cleaning function that simplifies the process.
If your unit has a self-clean button: fill the reservoir with a solution of 1 tablespoon white vinegar per cup of water, press the cleaning cycle button, and let it run. When the cycle finishes, drain the reservoir, refill with plain water, and run another cycle to rinse. For units without a self-clean function, follow the same process manually — fill, circulate for 10 minutes with the ice-making function off (just the water pump running), drain, and rinse.
Remove any accessible parts — the ice basket, water reservoir, and drip tray — and scrub them with baking soda and a soft brush. A bottle brush works well for reaching inside narrow water channels. Let everything air dry before reassembling.
Cleaning a Built-In Undercounter Ice Maker
Built-in units from Scotsman, U-Line, and Sub-Zero produce large volumes of ice and accumulate scale faster. These machines have a dedicated cleaning cycle activated through the control panel. You will need ice machine cleaner — a nickel-safe descaling solution — rather than vinegar. Brands like Nu-Calgon Ice Machine Cleaner ($8-$12) and Manitowoc Ice Machine Cleaner ($10-$15) are formulated for this purpose.
Consult your owner’s manual for the exact cleaning procedure, as it varies by brand. The general process involves removing all ice, adding the cleaning solution to the water reservoir, running the cleaning cycle (15-20 minutes), draining, rinsing with fresh water, and running a sanitize cycle with a food-safe sanitizer. Most manufacturers recommend cleaning every 6 months, but hard water areas may need quarterly cleaning.
Descaling Mineral Buildup
Hard water deposits (calcium and lime scale) are the leading cause of reduced ice production and cloudy cubes. White, chalky buildup on metal surfaces and water lines is the telltale sign. Vinegar dissolves light scale, but heavy deposits need a stronger acid solution.
Citric acid is effective and food-safe. Dissolve 2 tablespoons of citric acid powder in 1 quart of warm water and use it to soak affected components for 15-30 minutes. Scrub with a soft nylon brush, rinse thoroughly with clean water, and dry. For stubborn scale on metal evaporator plates, a commercial ice machine descaler penetrates faster than vinegar or citric acid.
Water Filter Maintenance
If your refrigerator or built-in ice maker uses a water filter, replacing it on schedule is just as important as cleaning the machine. A saturated filter does not remove contaminants effectively and can actually release trapped particles back into the water. Most filters last 6 months or 200-300 gallons — whichever comes first.
Knowing how to clean ice maker components means nothing if the incoming water carries sediment, chlorine, or excess minerals that immediately recontaminate the machine. A fresh filter combined with regular cleaning keeps ice clear, tasteless, and odor-free between maintenance cycles.
Preventing Future Buildup
A few simple habits extend the time between deep cleanings. Empty and discard old ice every 1-2 weeks — even in the freezer, ice sublimates and absorbs odors over time. Keep the area around the ice maker free of food with strong odors (open packages of fish, onions, and garlic are common culprits). Wipe the ice bin monthly with a baking soda solution even when it looks clean.
For countertop units, always use filtered or bottled water rather than unfiltered tap water. The lower mineral content means less scale and longer intervals between cleanings. Drain and dry the unit completely if it will sit unused for more than a week to prevent stagnant water from developing biofilm.
