How to Clean Mold Out of a Washing Machine

Mold is a common but unwelcome guest in many households, and your washing machine is not immune. Moisture, detergent residue, and lack of airflow can turn your washer into a breeding ground for mold. If you've noticed a musty smell, dark spots around the rubber gasket, or buildup in the detergent tray, mold may be the culprit.

This guide will walk you through why mold forms in washing machines, how to effectively clean it, and tips to prevent it from returning.

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Why Mold Grows in Washing Machines

Washing machines, especially front-loading models, are frequently exposed to moisture and warmth—ideal conditions for mold growth. Here are the primary causes:

Residual moisture: After a wash cycle, water often remains inside the machine, particularly around the rubber door gasket.
Detergent and fabric softener residue: These substances can stick to the interior and serve as food for mold.
Lack of ventilation: Keeping the door shut between washes traps moisture inside.
Washing at low temperatures: Cold washes save energy but don’t kill mold spores.

Signs Your Washing Machine Has Mold

Musty or sour smell coming from the drum or laundry.
Visible black or green spots on the rubber gasket, detergent drawer, or drum.
Clothes that smell bad even after washing.
Increased allergy symptoms when handling clean laundry.

Step-by-Step Guide: How to Clean Mold from Your Washing Machine

1. Gather Your Cleaning Supplies

Gather Your Cleaning Supplies

You'll need:

White vinegar
Baking soda
A spray bottle
A clean cloth or sponge
An old toothbrush
Rubber gloves (optional)

2. Clean the Gasket

Clean the Gasket

The rubber gasket around the door is a prime location for mold.

Mix equal parts white vinegar and water in a spray bottle.
Spray the solution generously around the gasket and let it sit for 5-10 minutes.
Use a cloth or toothbrush to scrub away mold and residue.
Dry thoroughly with a clean towel.

3. Clean the Detergent Drawer

Remove the detergent drawer (check your manual if unsure how).
Soak it in hot, soapy water and scrub with a toothbrush.
Spray the inside of the drawer housing with vinegar and wipe clean.

4. Run a Cleaning Cycle

Pour 2 cups of white vinegar into the drum.
Add 1/4 cup of baking soda directly to the drum or detergent drawer.
Run the washer on the hottest cycle with no clothes inside.
If your machine has a self-cleaning cycle, use that instead.

5. Clean the Filter (if applicable)

Some machines have a drain filter that collects lint and debris.

Locate and remove the filter (usually behind a small panel at the bottom).
Clean it under running water and remove any trapped debris.
Reinstall the filter securely.

Preventing Mold in the Future

Leave the door open between washes to allow air circulation.
Wipe down the gasket and drum after each wash.
Use high-efficiency detergent sparingly to avoid residue.
Run a monthly cleaning cycle with vinegar or a washing machine cleaner.
Avoid leaving wet clothes in the machine for extended periods.

When to Call a Professional

If mold persists despite regular cleaning or causes visible damage to your washer, it may be time to contact a technician. Mold that gets into the internal components could be harder to eliminate and might require professional servicing or part replacement.

Conclusion

Cleaning mold out of a washing machine may seem like a hassle, but with regular maintenance, it’s a manageable task. Not only will your washer smell fresher and perform better, but your clothes will also come out cleaner. With the right practices, you can keep mold at bay and extend the life of your appliance.