How to Clean Mold From Your Washing Machine (Front-Load & Top-Load)

If your clothes come out of the washer smelling worse than when they went in, mold or mildew is the likely cause. It is especially common in South Florida, where humid air means a washer rarely dries out on its own between loads. Front-load washers are the most prone, but top-loaders are not immune. Here is how to clean it out properly — and how to stop it coming back.

Safety Before You Start

• Unplug the washer before you reach into the gasket folds, remove the dispenser or open the drain filter.
• Never mix bleach with vinegar or ammonia. Bleach and vinegar together release chlorine gas. Pick one cleaner per session and run a plain rinse cycle before switching.
• Wear gloves and keep the room ventilated; a fan or an open window is enough.
• Check your manual before using bleach on a stainless drum or a specialty cleaner — some manufacturers name what they approve.

Why Washing Machines Get Moldy

Mold thrives in warm, damp, dark places — exactly what the inside of a washer provides between loads. The usual contributors:

• Water left behind in the door gasket, the drum and the detergent dispenser
• Too much detergent or softener, which leaves a film that mold feeds on (especially in HE washers)
• Only cold or short cycles, which never get hot enough to break that film down
• A closed door between loads, trapping humid air inside
• Humid laundry rooms where nothing dries naturally

Front-Load Washer: Deep Cleaning Steps

Step 1: Clean the Door Gasket

The rubber door gasket is ground zero for front-load mold. Fold back the lip and you will likely find black spots, hair and lint. Mix equal parts white vinegar and water in a spray bottle, spray the folds thoroughly, leave it for ten minutes, then scrub with an old toothbrush. A paste of baking soda and water helps on stubborn spots. Dry the folds with a towel when you finish.

Step 2: Run a Cleaning Cycle

Add 2 cups of white vinegar to the detergent dispenser and run the hottest, longest cycle available — or the "Clean" or "Tub Clean" cycle if your washer has one. Commercial washer-cleaner tablets do the same job; use one or the other, not both.

Step 3: Follow with Baking Soda

After the vinegar cycle, sprinkle half a cup of baking soda directly into the drum and run another hot cycle. It lifts remaining residue and neutralizes odor.

Step 4: Clean the Dispenser

Remove the dispenser drawer — most pull straight out once you press a release tab. Soak it in hot water with a splash of vinegar for thirty minutes and scrub every compartment. Clean the cavity it slides into with a bottle brush; mold often hides on the roof of that opening.

Step 5: Clear the Drain Pump Filter

Most front-loaders have a small access door at the bottom front. Lay towels down and put a shallow tray under it, because water will come out. Open the filter slowly, let it drain, pull out lint, coins and hair, rinse it, and screw it back until it is snug.

Top-Load Washer: Deep Cleaning Steps

Top-loaders mold less, but odor builds up around the agitator, under the rim and inside the lid.

1. Fill the washer with the hottest water available
2. Add 4 cups of white vinegar, let it agitate for a minute, then pause the cycle and let it soak for an hour
3. While it soaks, wipe the top rim, the underside of the lid and the softener cup with a cloth dipped in the vinegar water
4. Resume the cycle and let it finish
5. Run a second hot cycle with 1 cup of baking soda

What You Find, and What It Means

• Surface spots that wipe away: ordinary buildup. Cleaning plus the prevention habits below should keep it away.
• Black staining that will not shift from inside the gasket rubber: the mold has grown into the material. Cleaning will improve the smell, but the stain stays; replacing the gasket is the only way to remove it.
• Standing water in the drum or a full drain filter after a cycle: the washer is not draining completely, and that leftover water keeps feeding the smell. See why a washer will not drain fully.
• A smell that returns within days of a full clean: water is collecting somewhere you cannot reach, such as the outer tub or a sagging drain hose.
• A torn gasket or water on the floor after cleaning: the seal is no longer doing its job — read our guide to tracking down a washer leak before running more loads.

Preventing Mold From Returning

• Leave the door or lid open after every wash so the drum can dry
• Use HE detergent in HE washers, and measure it — more is not better
• Go easy on fabric softener, which leaves a waxy film behind
• Wipe the gasket dry after the last load of the day (front-loaders)
• Move wet clothes out promptly instead of leaving them in the drum
• Run a hot wash regularly — towels or sheets on the hottest setting your fabrics allow

A Cleaning Schedule That Works Here

• After each laundry day: door open, gasket wiped, dispenser drawer pulled out slightly to air.
• Monthly: a vinegar or cleaner-tablet cycle, and a check of the gasket folds.
• Every two to three months: clear the drain pump filter and soak the dispenser.
• Twice a year: check the inlet hoses for bulges or cracks and the drain hose for kinks.

When to Stop and Call a Technician

Stop cleaning and book a visit if the drain filter will not open or leaks once refitted, if water stays in the drum after the spin, if the gasket is torn, or if the smell survives two full cleaning routines. A technician can open the cabinet, clean the outer tub and the hoses you cannot reach, and replace a gasket or pump if one has failed. Our washer repair technicians handle this every week; you can book a washer diagnosis online.

Quick Answers

Is washer mold dangerous?

For most people it is mainly an odor and a nuisance, but anyone with allergies or asthma may react to it. Clean it out rather than masking the smell.

Can I use bleach instead of vinegar?

Yes, if your manual allows it — a cleaning cycle with a small amount of bleach works well. Just never combine it with vinegar, and rinse with a plain cycle before switching between them.

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