If your washer smells musty or leaves black spots on clothes, mold may be growing inside the drum, gasket, dispenser, or drain areas.
This guide explains how to clean mold from washing machine components safely and how to stop it from coming back.
Why mold grows in washing machines
Front-load washers and high-efficiency machines are especially prone to mold because they seal tightly and often retain moisture after cycles.
Residue from detergent, fabric softener, body oils, and lint creates a food source for mold spores, while warm, damp conditions help them spread.
Common problem areas include the rubber door gasket, detergent drawer, drum, filter, pump, and the area around the door glass.
Even top-load washers can develop mildew if the lid stays closed and the tub is not cleaned regularly.
Signs your washing machine has mold
- Persistent musty, sour, or damp odor
- Black, green, or pink residue on the gasket or drawer
- Visible slime, film, or specks inside the drum
- Clothes that smell worse after washing
- Grey buildup in dispenser compartments
- Water pooling in hidden crevices after a cycle
If you notice more than one of these signs, clean the entire machine instead of only wiping the drum.
What you need before cleaning
- Rubber gloves
- Microfiber cloths or soft sponges
- Old toothbrush or small cleaning brush
- White vinegar or bleach, depending on your washer manual
- Baking soda for odor removal
- Warm water
- Bucket or shallow bowl
Before using any cleaner, check the manufacturer’s care instructions.
Some brands recommend bleach for sanitizing, while others advise against vinegar on rubber parts, metal components, or specific finishes.
How to clean mold from washing machine drum and surfaces
Start by unplugging the machine or turning it off at the breaker if needed for safety.
Remove any laundry, then inspect the interior for visible mold or residue.
- Wipe the drum with a damp cloth to remove loose debris.
- Mix a cleaning solution approved for your machine.
For many washers, a diluted bleach solution or a washer-cleaning cycle with a manufacturer-recommended cleaner works well.
- Apply the solution to the drum surfaces and scrub gently with a microfiber cloth.
- Run an empty hot cycle using the recommended cleaner to flush the interior.
- After the cycle ends, open the door and dry the inside completely with a clean towel.
If your machine has a self-clean or tub-clean cycle, use it according to the manual.
These cycles are designed to raise water temperature and improve rinse performance, which helps remove mold and detergent residue.
How to clean the rubber gasket on a front-load washer
The gasket is one of the most common mold hotspots because it traps moisture, lint, and detergent film.
Pull the folds back carefully and inspect all hidden edges.
- Wipe away loose debris with a dry cloth.
- Apply a cleaning solution to the gasket and let it sit briefly.
- Scrub the folds, seams, and underside with a soft brush or toothbrush.
- Rinse with a damp cloth to remove cleaner and residue.
- Dry every fold thoroughly, since leftover moisture can restart mold growth.
If the gasket is badly stained or cracked, cleaning may not fully restore it.
A damaged seal can hold moisture even after repeated washing, and replacement may be necessary.
How to clean the detergent drawer and dispenser
Detergent drawers often collect thick buildup from liquid detergent, fabric softener, and powder residue.
That buildup can turn into a sticky layer where mold thrives.
- Remove the drawer if your model allows it.
- Soak it in warm water to loosen residue.
- Scrub compartments, corners, and the underside with a brush.
- Clean the drawer housing inside the machine with a cloth or brush.
- Let all parts dry before reinstalling.
Pay attention to dispenser nozzles and water inlet holes, since residue can hide there and continue feeding mold after the drawer is cleaned.
How to clean the filter and drain area
Many modern washers have a lint or drain pump filter that can trap hair, lint, coins, and grime.
If neglected, that material can become foul-smelling and contribute to mold growth.
Locate the filter according to the user manual, then place a towel and shallow container underneath before opening it.
Remove debris, rinse the filter, and clean the access area with a cloth.
Dry the compartment completely before closing it.
If water drains slowly or the washer emits a sewage-like smell, the drain line or pump may also need attention.
In that case, a technician may be helpful, especially if the machine shows error codes or repeated drainage problems.
Can you use vinegar or bleach?
Both vinegar and bleach are common household cleaners, but they are not interchangeable.
Bleach is effective for sanitizing many washer surfaces when used correctly, while vinegar can help with odors and mineral buildup in some machines.
- Use bleach only if your washer manual allows it and you follow the proper dilution and cycle instructions.
- Use vinegar cautiously, since repeated use on rubber seals or certain metal parts may cause wear in some models.
- Never mix bleach and vinegar, because that combination releases toxic chlorine gas.
If you want a safer all-around option, many appliance manufacturers recommend a dedicated washing machine cleaner designed for high-efficiency systems.
How to prevent mold from coming back
Prevention matters as much as cleaning.
A few routine habits can keep your washer fresh and reduce the chance of mildew returning.
- Leave the door or lid open after each cycle to let moisture evaporate.
- Wipe the gasket, drum edge, and door glass after washing.
- Use the amount of detergent recommended for your load size and water hardness.
- Choose HE detergent for high-efficiency washers.
- Run a hot cleaning cycle regularly, especially in humid climates.
- Remove wet laundry promptly instead of letting it sit inside the machine.
- Clean the dispenser drawer and filter on a schedule.
Overuse of detergent is a major cause of residue buildup.
Too much soap can leave behind film that mold uses as a food source, especially in low-water wash cycles.
When mold requires professional repair
Some problems go beyond routine cleaning.
Call a technician if the odor returns quickly after cleaning, if mold appears inside inaccessible parts, or if the washer leaks, drains poorly, or shows signs of seal damage.
Persistent contamination can indicate hidden moisture in hoses, the pump, or the outer tub.
If household members have respiratory sensitivities or mold allergies, thorough cleaning is especially important.
In severe cases, replacing a gasket, hose, or filter may be the most effective fix.
How often should you clean a washing machine?
For most households, a monthly cleaning cycle is a good baseline.
If you use a front-load washer, live in a humid area, wash heavily soiled loads, or frequently use cold water, you may need to clean more often.
A quick wipe after each load and a deeper clean every few weeks can prevent the conditions mold needs to grow.
Regular maintenance also helps your washer perform better and keeps clothes smelling fresher.