A new washing machine should leave your laundry smelling fresh—not musty. But some homeowners notice the opposite: clothes smell musty after installing a new washer.
This can be frustrating, especially when everything is brand new. The issue is more common than you might think and is usually caused by moisture, detergent buildup, or how modern washers are designed.
Here’s what’s likely happening—and how to fix it.
1. New Washers Use Less Water (and That Changes Cleaning)
Modern washers, especially high-efficiency (HE) models, use significantly less water than older machines. While this saves energy and water, it can sometimes leave behind:
- Detergent residue
- Dirt particles
- Fabric softener buildup
If residue isn’t fully rinsed out, it can trap bacteria and cause a musty smell.
What to try:
- Use HE detergent only
- Reduce the amount of detergent (more is not better)
- Run an extra rinse cycle for heavily soiled loads
2. The Washer Drum May Have Manufacturing Residue
Brand new washers sometimes contain factory residue, oils, or dust from manufacturing and shipping.
If you started washing clothes immediately without running a cleaning cycle first, these residues can transfer odors to fabrics.
Fix it by running:
- An empty hot water cycle
- Add a washer cleaner or 1–2 cups of white vinegar
After one or two cleaning cycles, the smell usually disappears.
3. Moisture Gets Trapped Inside the Machine
Front-load washers in particular are known for trapping moisture inside the drum and door seal.
This creates an environment where mildew can develop quickly—even in a new machine.
Common problem areas:
- Rubber door gasket
- Detergent drawer
- Inner drum
To prevent this:
- Leave the washer door open after each load
- Wipe the rubber seal dry
- Remove water from folds in the gasket
4. Drain Hose Installation Might Be Incorrect
A surprising cause of musty-smelling clothes is an improperly installed drain hose.
If the hose is inserted too far into the standpipe, it can create a siphoning effect or allow sewer odors to enter the washer.
Signs include:
- Clothes smell worse after washing
- Odor resembles damp or sewage smell
- Smell is strongest right after a cycle
Make sure:
- The drain hose has a proper air gap
- It’s not sealed tightly into the pipe
- It follows the manufacturer’s height recommendations
5. Low-Temperature Washing Encourages Odors
Many people use cold water cycles to save energy, but consistently washing in cold water can allow bacteria and detergent buildup to accumulate.
Over time, this leads to musty-smelling clothes.
To balance efficiency and cleanliness:
- Run a hot wash cycle at least once per week
- Wash towels or bedding on warm/hot settings
- Use the washer’s “clean” or “sanitize” cycle if available
The Environmental Protection Agency highlights that proper washing practices and machine maintenance are important for both efficiency and hygiene in household appliances.
6. Overloading the Washer Can Trap Odors
New washers often have large drums, but overloading them can prevent proper cleaning.
When clothes are packed too tightly:
- Water and detergent can’t circulate properly
- Dirt and bacteria remain trapped
- Fabrics don’t rinse fully
Try washing slightly smaller loads and see if the smell improves.
How to Get Rid of Musty Smell Fast
If your clothes smell musty after installing a new washer, follow this quick reset:
- Run an empty hot cycle with vinegar or washer cleaner
- Wash a small load with less detergent
- Use an extra rinse cycle
- Dry clothes immediately after washing
- Keep the washer door open between loads
These steps usually restore fresh-smelling laundry within a few washes.
FAQ
Why do my clothes smell worse after washing in a new machine?
This often happens due to detergent buildup, trapped moisture, or incorrect drain hose installation, especially in high-efficiency washers.
Is a musty smell normal in a new washer?
It can happen briefly due to manufacturing residue or initial moisture buildup, but it should go away after proper cleaning and use.
How do I prevent mildew smell in my washer?
Leave the door open after use, clean the gasket regularly, avoid excess detergent, and run periodic hot cleaning cycles.