Washing Machine Smells Like Mildew How to Identify and Fix the Problem

A mildew smell in your washing machine comes from trapped moisture and residue inside the drum, seals, or detergent compartments, which encourages mold growth. You can eliminate this odor by thoroughly cleaning the machine and drying it properly. Regular maintenance and proper usage habits help prevent the smell from returning and keep your laundry fresh.

Why does my washing machine smell like mildew?

Mildew smells develop when water and detergent residue remain trapped inside the machine, especially in damp areas like the rubber door seal, detergent drawer, and hidden crevices in the drum. Closing the door right after a wash or using too much detergent often traps moisture instead of letting it evaporate, creating an ideal environment for mold to grow. Cold water washes may not kill mold spores as effectively as hot water, allowing buildup over time.

How do I know if the smell is coming from mold or other causes?

Mildew has a musty, damp scent that differs from sour or rotten odors caused by bacteria or dirty clothes left too long. If the smell appears immediately after a wash cycle and persists even when your clothes are clean, mold or mildew is likely inside the machine. You might see black or gray spots on the door seal or detergent drawer or feel a slimy film in those areas. If the smell only comes from clothes or standing water in the drum, other factors may be responsible.

What is the safest way to clean and remove the mildew smell?

1. Run an empty hot water cycle to loosen residue inside the drum.
2. Wipe the rubber door seal thoroughly with a cloth soaked in equal parts water and white vinegar, focusing on folds where mold hides.
3. Remove the detergent drawer and clean it with warm soapy water, scrubbing away buildup.
4. If your machine has a lint filter, clean or replace it according to the manufacturer's instructions.
5. Run another hot cycle using a washing machine cleaner or add half a cup of baking soda and one cup of white vinegar directly into the drum.
6. After cleaning, leave the door and detergent drawer open to air dry completely. Avoid harsh chemicals that can damage seals or finishes.

How can I make sure the mildew smell is gone?

After cleaning, run a short rinse cycle without detergent or clothes to remove leftover cleaner or residue. Check the drum and door seals by smell; the musty odor should be gone or much weaker. Inspect hidden areas like the folds of the rubber seal and detergent drawer for any remaining dampness or mold. If the smell continues, repeat the cleaning steps or use specialized washing machine cleaners. Always dry the machine thoroughly before using it again to prevent moisture buildup.

What can I do to prevent mildew smells from coming back?

Keep your washing machine dry by leaving the door and detergent drawer slightly open after each use to allow air circulation. Use the correct amount of high-efficiency detergent to avoid excess residue, and wash with hot water when possible to reduce microbial growth. Clean the detergent drawer and door seals at least once a month. Avoid leaving wet clothes sitting inside the machine for extended periods. For front-loading washers, run a maintenance cycle with a washing machine cleaner or a mixture of vinegar and baking soda regularly to keep the interior fresh.

When should I call a professional to inspect my washing machine?

If mildew smells return quickly despite thorough cleaning and proper care, it may signal a deeper issue. Problems like clogged drainage, damaged seals, or mold growing inside parts you can’t reach require professional attention. Contact a technician if you notice water leaks, unusual noises, or persistent dampness in inaccessible areas. Early inspection can prevent more serious damage and costly repairs.

Conclusion

To get rid of mildew smells in your washing machine, clean out trapped moisture and residue, then adopt habits that keep your machine dry and fresh. Follow the cleaning and prevention steps here, and watch your machine closely. If the odor persists or you face mechanical problems, have a professional inspect your washer to keep it working well and your laundry smelling clean.