A musty smell emanating from your clothes dryer is a common problem, and understanding the causes is the first step to resolution. Often, this unpleasant odor stems from accumulated lint and moisture build-up within the dryer vent. Regular dryer vent cleaning, a service provided by many local handymen, is crucial for preventing this issue. The United States Fire Administration emphasizes the importance of keeping dryer vents clean to prevent fires, a concern often associated with neglected clothes dryer smells musty. Finding the root cause of clothes dryer smells musty will help prevent this issue and extend the lifespan of your appliance.

Image taken from the YouTube channel Sheets Laundry Club , from the video titled How to Get Bad Smells Out of Dryer .
Clothes Dryer Smells Musty? 5 Fixes You Need To Know
A musty-smelling clothes dryer is not only unpleasant, but it can also transfer that odor onto your freshly cleaned clothes. This is usually caused by trapped moisture and lint buildup, creating the perfect environment for mold and mildew. Fortunately, you can often resolve this issue yourself with a few simple steps. Here’s a breakdown of five fixes to tackle that "clothes dryer smells musty" problem:
1. Clean the Lint Trap Thoroughly
The lint trap is the most obvious culprit, but its importance cannot be overstated. Neglecting this simple task is a primary reason for musty odors.
How to Clean the Lint Trap
- Locate the lint trap: This is usually found either inside the dryer drum or on the top of the dryer.
- Remove the lint: Pull out the lint screen and remove all visible lint. Ideally, you should do this after every drying cycle.
- Wash the lint trap: At least once a month, wash the lint trap with warm, soapy water. This removes residue that lint alone cannot. Use a soft brush to scrub if necessary.
- Dry the lint trap: Ensure the lint trap is completely dry before replacing it.
Why This Works: Lint holds moisture, which then promotes mold and mildew growth. Regular cleaning eliminates this food source for unwanted microbes.
2. Inspect and Clean the Dryer Vent
The dryer vent, which exhausts hot air and moisture outside, can become clogged with lint over time. This restriction traps moisture inside the dryer, contributing to the musty smell.
Vent Cleaning Procedure
- Safety First: Disconnect the dryer from the power outlet.
- Locate the Vent: Find the vent on the back of the dryer and where it exits the house.
- Detach the Vent: Carefully disconnect the vent from the dryer and the wall.
- Clean the Vent: Use a dryer vent cleaning kit (available at most hardware stores) or a long brush to remove lint.
- Work from both ends of the vent to ensure complete cleaning.
- A vacuum cleaner can help suck up loosened lint.
- Inspect for Damage: Check the vent for any holes or tears and replace it if necessary.
- Reattach the Vent: Reconnect the vent securely to the dryer and the wall, ensuring no gaps for air leakage.
Benefits of a Clean Vent: A clean vent not only reduces musty smells but also improves drying efficiency and reduces the risk of fire.
3. Clean the Dryer Drum
Even if the lint trap is clean, residue from detergents, fabric softeners, and general grime can build up inside the dryer drum.
Cleaning the Drum Effectively
- Wipe Down with Vinegar: Mix equal parts white vinegar and warm water in a spray bottle. Spray the inside of the dryer drum and wipe it clean with a soft cloth. Vinegar is a natural disinfectant and deodorizer.
- Mild Soap Solution: For tougher stains, use a mild dish soap solution. Be sure to rinse thoroughly with a clean, damp cloth to remove any soap residue.
- Run a Cycle with Damp Towels: After cleaning, run the dryer on a low heat setting for about 15-20 minutes with a few clean, damp towels to help absorb any remaining moisture and odors.
4. Address Moisture Issues in the Laundry Room
The source of the musty smell could be the environment surrounding your dryer.
Identifying and Fixing Moisture Problems
- Check for Leaks: Inspect pipes, washing machine connections, and surrounding areas for any signs of water leaks.
- Improve Ventilation: Ensure the laundry room is well-ventilated. Open a window or use a fan to circulate air, especially after doing laundry.
- Dehumidifier: Consider using a dehumidifier in the laundry room to reduce moisture levels, especially in damp climates.
5. Leave the Dryer Door Open After Use
Allowing the dryer to air out after each cycle is crucial for preventing moisture buildup.
Why This Works
- Promotes Air Circulation: Leaving the door ajar allows air to circulate freely inside the drum, preventing moisture from being trapped.
- Deters Mold Growth: By reducing moisture, you create an unfavorable environment for mold and mildew to thrive.
Important Note: If you have small children or pets, be mindful of leaving the dryer door open. Consider installing a dryer door latch or other safety device to prevent accidental entrapment.
Clothes Dryer Smells Musty? Frequently Asked Questions
Here are some frequently asked questions to help you tackle that musty smell coming from your dryer.
What exactly causes my clothes dryer to smell musty?
A musty smell in your clothes dryer is typically caused by mold and mildew growth. This often happens because lint and moisture get trapped in the dryer, creating a damp environment that’s perfect for these organisms to thrive. Leftover damp clothes can also contribute.
How often should I clean my dryer to prevent musty odors?
You should clean the lint trap after every load. However, a deeper cleaning of the dryer vent and drum should be done at least every six months, or more frequently if you notice a musty smell returning quickly. This proactive approach prevents the buildup that causes your clothes dryer smells musty.
Can I use bleach to clean my dryer drum?
While bleach can kill mold, it can also damage some dryer drum materials. A safer and effective alternative is to use a mixture of white vinegar and water to wipe down the drum. Be sure to dry it thoroughly afterward to prevent a reappearance of the musty clothes dryer smell.
What if I’ve cleaned my dryer and it still smells musty?
If the smell persists, it’s possible the source is deeper within the venting system. Consider having a professional dryer vent cleaning service inspect and clean the vent thoroughly. This can remove stubborn buildup contributing to the "clothes dryer smells musty" problem.
Hopefully, these tips helped you get rid of those clothes dryer smells musty! Good luck, and happy (freshly scented) drying!