Washer-dryer combo door seal shows black spots and mildew; occasional small leaks at bottom of door.

Safety first: Use gloves and ensure good ventilation when using mold cleaners or bleach.

• Clean gasket thoroughly: Mix a diluted bleach solution or use a commercial washer gasket cleaner. Wipe all folds and surfaces of the gasket, removing mold and residue.
• Dry after use: After each wash, wipe the gasket dry and leave the door slightly open.
• Inspect for damage: If the gasket is cracked or deformed, replace the door gasket to prevent leaks.