Safety first: Keep the door open when not in use to prevent mold. Wear gloves when cleaning moldy areas.

Clean door boot: Wipe the gasket with a cloth soaked in a mixture of hot water and mild bleach or washer cleaner. Pull back the folds to remove trapped debris.
Clean dispenser: Remove and scrub the detergent drawer and housing to remove slime and residue.
Run cleaning cycle: Run a tub clean or hottest wash cycle with no clothes using a washer cleaner or 1 cup of bleach.
Improve habits: Use HE detergent sparingly, run occasional hot cycles, and leave the door and dispenser drawer slightly open between uses.

Washer-dryer combo has a strong moldy or musty odor inside the drum.

Possible Causes