 *Photo: Unsplash*
Countertop ice makers have become a summer essential in Montreal apartments and triplexes. When July temperatures push into the low 30s and humidity climbs above 80 percent, a portable ice machine changes the game — cold drinks on demand without waiting for a freezer tray to set or carrying bags of store-bought ice up three flights of stairs.
But countertop ice makers have a reputation problem: they get moldy faster than almost any other countertop appliance. The combination of standing water, warm internal temperatures, and the constant freeze-thaw cycle creates ideal conditions for mold, yeast, and bacterial biofilm. Montreal's humid summers make the situation more acute — at 28–32°C with 70–85% relative humidity in July and August, a portable ice machine that isn't cleaned regularly will develop a musty smell and visible pink or black growth within two to three weeks of first use.
This guide covers every cleaning and descaling step for the most common countertop ice makers sold in Montreal: the Frigidaire EFIC108 (Canadian Tire, Walmart), hOmelabs HZB-12B (Amazon.ca), Magic Chef MCIM22TS (Costco, Walmart), NewAir AI-100 (Best Buy), and GE Profile Opal 2.0 (Best Buy). It also covers the specific challenge Montreal tap water poses — hard water with 90–150 mg/L of dissolved calcium and magnesium carbonates that deposits scale on the evaporator rods faster than almost any other major Canadian city.
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Why Countertop Ice Makers Get Moldy So Fast
Unlike a chest freezer or a refrigerator ice maker, a countertop portable ice machine does not stay cold between use cycles. When the ice is used and the machine sits idle, the residual water in the reservoir warms to room temperature. That warm, wet environment — with mineral residue from ice cycles and trace organic matter from the tap water — is precisely where mold, yeast, and bacteria thrive.
The most common organism is Serratia marcescens, the same pink-slime bacterium that appears in bathroom grout and [SodaStream bottle caps](/en/blog/how-to-clean-a-sodastream-montreal). It produces a characteristic rosy or orange-pink discoloration on plastic and silicone parts, particularly at water lines and the bottom of the reservoir. It is not dangerous in small quantities, but it indicates a biofilm colony that will expand and eventually contaminate every batch of ice the machine produces.
Montreal amplifiers: In a first-floor Plateau triplex with no A/C running at 31°C, a partially filled ice maker reservoir left for three days provides everything mold needs to establish itself. The solution is not to avoid using the machine — it is to clean it on a schedule that matches how intensively you use it.
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Understanding Montreal's Hard Water Impact
Montreal tap water is treated at the Atwater and Charles-J. Des Baillets filtration plants. It is safe to drink and generally lower in minerals than many cities, but it still contains 90–150 mg/L of dissolved calcium carbonate (CaCO₃) — the same compound that forms white limescale on [electric kettle heating elements](/en/blog/how-to-clean-an-electric-kettle-montreal) and espresso machine group heads.
In a countertop ice maker, the water contacts the evaporator rods — the metal prongs (typically 9 on a standard bullet-ice machine) that the refrigerant chills to below freezing. Ice forms around these rods and then falls into the basket when the rods are briefly heated. With every freeze-thaw cycle, a thin film of mineral residue is deposited on the rods. Over weeks, this builds into a white-grey crust that reduces the rod's thermal efficiency.
Symptoms of scale buildup: Ice cubes become smaller and thinner. Cycle times increase. The machine works harder and runs longer. If left unchecked, the scale can eventually prevent ice from releasing cleanly from the rods, causing the machine to cycle through water without producing usable ice.
Descaling with citric acid dissolves calcium carbonate without damaging the metal rods or internal plastic components. White vinegar also works but leaves a residual odor that transfers to ice. Citric acid is the better choice for Montreal's mineral-heavy tap water — it rinses clean and leaves no taste.
Where to buy citric acid in Montreal: Jean Coutu and Pharmaprix carry food-grade citric acid powder, usually stocked near canning supplies. Rachelle-Béry and Avril health food stores on Rue Sherbrooke, Avenue du Mont-Royal, and Côte-des-Neiges also carry it. Bulk stores on Rue Saint-Denis, Rue Bernard, and Rue Beaubien stock it by weight at lower cost.
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Weekly Cleaning Protocol
If you use your ice maker daily in summer, clean it weekly. Here is the complete routine:
What you need: Citric acid powder or diluted white vinegar, dish soap, a soft cloth or microfiber sponge, a small cleaning brush, access to a sink.
Step 1: Unplug the machine. Always disconnect power before cleaning — ice makers contain a compressor, an evaporator, and water pump electronics. Water contact with live electronics can cause permanent damage or shock.
Step 2: Drain the water reservoir. Most portable ice makers have a drain plug on the bottom or back. Pull the plug and let all remaining water drain into a sink or bowl. If your model has no drain plug, tilt the machine carefully over a sink to empty the reservoir.
Step 3: Remove the ice basket and ice scoop. These are the highest-touch parts and accumulate residue quickly. Wash them by hand with warm water and a few drops of dish soap. Rinse thoroughly. Do not put them in the dishwasher — the high heat of a dishwasher cycle can warp thin plastic baskets and cause them to no longer seat correctly inside the machine.
Step 4: Wipe down the interior. Mix a solution of 1 tablespoon of citric acid powder in 2 cups (500 mL) of water (or substitute 1 cup white vinegar and 1 cup water). Dampen a soft cloth and wipe all interior walls, the bottom of the reservoir, and the underside of the lid. Pay special attention to the water line — the horizontal ring at the fill level where minerals and biofilm concentrate most heavily.
Step 5: Clean the evaporator rods. These are the metal prongs in the center of the machine. With a soft cloth lightly dampened in citric acid solution, gently wipe each rod from base to tip. Do not use a scouring pad or anything abrasive — the rods have a thin plating that scratches easily. If heavy scale is present (white or grey crust that does not wipe off), run a full descaling cycle instead (see below).
Step 6: Rinse with clean water. Reinstall the drain plug. Fill the reservoir with fresh tap water, run one ice-making cycle, and discard all the ice produced. This flushes any cleaning residue from the internal water circuit, the pump, and the spray nozzle.
Step 7: Leave the lid open to dry. After cleaning, leave the machine unplugged with the lid open for at least two hours. This allows all interior surfaces to dry completely before the next use or before storage. A machine stored with residual moisture inside will develop mold within days — this is the single most common mistake Montreal households make when putting ice makers away at the end of summer.
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Monthly Descaling Cycle
For Montreal tap water, descale your ice maker once a month during the summer peak-use season, and once every two to three months in the off-season.
Steps:
1. Mix the descaling solution: dissolve 1 tablespoon of citric acid powder in 2 cups (500 mL) of warm water. 2. For machines with a self-cleaning mode (hOmelabs HZB-12B, GE Profile Opal 2.0): pour the citric acid solution into the reservoir and press the self-cleaning button — the machine will run a cleaning cycle automatically. 3. For machines without a self-cleaning mode (Frigidaire EFIC108, Magic Chef MCIM22TS, NewAir AI-100): pour the solution into the reservoir and run 2–3 ice-making cycles. Discard all ice produced. The solution will circulate through the pump and over the evaporator rods, dissolving mineral deposits. 4. After the descaling cycles, drain the machine completely, refill with plain tap water, and run 2–3 more flush cycles. Discard all ice from these flush cycles. 5. If scale is visible and persistent on the rods after the descaling cycle, wipe the rods directly with a cloth dampened in undiluted citric acid solution. Let it sit for 3–5 minutes, then wipe clean.
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Mold Remediation
If you see pink, orange, or black growth in the reservoir or on any internal surface, the machine needs a disinfecting clean before regular use:
1. Prepare a dilute bleach solution: 1 teaspoon of household bleach (5% sodium hypochlorite — sold as Javex at Provigo, IGA, and Maxi) in 1 litre of water. 2. Wipe all affected surfaces with a cloth dampened in the bleach solution. Let it sit for 5 minutes. 3. Rinse thoroughly — bleach residue on ice is a health concern. Run at minimum 3 full flush cycles with plain water, discarding all ice each time, before consuming ice from the machine. 4. If mold is visible on the evaporator rods themselves or if the machine has been idle with water inside for more than a month, the situation warrants professional attention. A [professional deep cleaning](/en/services/deep-cleaning) service can sanitize the machine to food-safe standards, particularly for Airbnb or rental properties where guests will be consuming the ice.
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Quick Maintenance Schedule
| Frequency | Task | |---|---| | After every use | Remove leftover ice; wipe ice basket; leave lid ajar | | Every 3–5 days (Montreal summer) | Drain and rinse reservoir with clean water | | Weekly (daily summer use) | Full interior wipe + evaporator rod clean + flush cycle | | Monthly | Full descaling cycle with citric acid solution | | Before off-season storage | Full clean + 24-hr open-lid dry + silica gel sachet |
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Ice Maker Models Available in Montreal
| Model | Price (CAD) | Where to buy | Ice type | Self-clean mode | |---|---|---|---|---| | Frigidaire EFIC108 | $80–$100 | Canadian Tire (Décarie, Anjou, Côte-des-Neiges), Walmart | Bullet ice | No | | hOmelabs HZB-12B | $90–$120 | Amazon.ca | Bullet ice | Yes | | Magic Chef MCIM22TS | $80–$110 | Walmart, Costco (Marché Central, Brossard, seasonal) | Bullet ice | No | | NewAir AI-100 | $120–$150 | Best Buy (Côte-des-Neiges, Dorval, Laval) | Bullet ice | No | | GE Profile Opal 2.0 | $400–$480 | Best Buy | Nugget ice | Yes |
Note: Costco carries seasonal ice makers in spring and summer (typically April–August) at competitive prices. The Marché Central and Brossard locations typically receive larger inventory. Stock sells out quickly during heat waves.
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Frequently Asked Questions
Q: How often should I clean my countertop ice maker?
A: Every week if you use it daily in summer. Every two weeks for moderate summer use. Before storing the machine for more than three days. In a Montreal July or August, a machine left with water in the reservoir for four days at room temperature will almost certainly develop visible mold growth.
Q: Can I use bleach to clean my portable ice maker?
A: Yes, but diluted and rinsed thoroughly. Use 1 teaspoon of Javex (sodium hypochlorite 5%) in 1 litre of water, wipe all surfaces, let it sit 5 minutes, then run at least 3 full flush cycles with plain water before making ice to consume. Bleach is for mold remediation — for regular weekly cleaning, citric acid or diluted white vinegar is safer and easier to rinse out completely.
Q: How do I descale the evaporator rods on my countertop ice maker?
A: Mix 1 tablespoon of citric acid powder in 2 cups (500 mL) of warm water. Pour into the reservoir and run 2–3 ice-making cycles, discarding the ice each time. Then run 2–3 more cycles with plain tap water to flush the citric acid out. For stubborn scale visible on the rods, wipe directly with a soft cloth dampened in citric acid solution — let it sit 3 minutes, then wipe clean. Never use abrasive pads on evaporator rods.
Q: Why does my ice maker produce hollow, thin, or very small ice?
A: Almost always mineral scale buildup on the evaporator rods. When the rods are coated in calcium carbonate from Montreal tap water, they cannot chill the surrounding water as efficiently, so less ice forms on each rod and it falls off before it is fully sized. Run a full descaling cycle with citric acid. Ice production should return to the rated output within a few cycles after descaling.
Q: There's pink or orange slime in my ice maker's water reservoir — what is it?
A: Serratia marcescens, a common environmental bacterium that produces pink-orange pigment on plastic and silicone surfaces in warm, wet, mineral-rich environments — exactly the conditions in a portable ice maker's reservoir. It is not dangerous in small quantities, but it indicates an established biofilm that will contaminate your ice. Clean immediately with the dilute bleach mold remediation protocol above, followed by thorough flush cycles.
Q: Can I use Montreal tap water in my countertop ice maker?
A: Yes — Montreal tap water is safe and palatable. However, the hard water content (90–150 mg/L of CaCO₃) means you should descale monthly rather than the quarterly interval recommended for soft-water regions. If you want completely clear ice without any cloudy mineral core, filtered water from a Brita pitcher or ZeroWater filter reduces dissolved minerals significantly. For regular bullet or nugget ice, Montreal tap water works fine with a consistent monthly descaling routine.
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*For more Montreal kitchen appliance cleaning guides, see our guides on [how to clean an ice cream maker](/en/blog/how-to-clean-an-ice-cream-maker-montreal), [how to clean an electric kettle](/en/blog/how-to-clean-an-electric-kettle-montreal), and [how to clean a SodaStream](/en/blog/how-to-clean-a-sodastream-montreal). If your ice maker needs a deep professional clean, or if you want your kitchen appliances sanitized before guests arrive, [Sparkling Stays offers professional home cleaning](/en/services/home-cleaning) across Plateau-Mont-Royal, Mile-End, Côte-des-Neiges, and throughout the Island of Montreal.*
