Why do my clothes smell musty even after washing them twice?

Two washes will not help if the cause is still there. The usual reason is the washing machine itself: a biofilm in the door gasket or dispenser re-coats every load. The other is drying. If the clothes go back in the basket damp, mildew restarts before they are put away. Clean the machine, wash with vinegar, then dry on full heat the same day.

Does white vinegar get the musty smell out of clothes?

Often, yes. A cup or two of plain white vinegar in a hot cycle with no detergent breaks down the musty residue and the detergent buildup that holds it. It works best as the first pass, followed by a baking soda wash. Vinegar will not fix a dirty washer or a load that never dries, though, so handle those too.

Can my washing machine make my clothes smell musty?

Yes, and it is the most common cause we see. Front-loader door gaskets trap water and grow a musty film, and top-loader dispensers do the same. If the empty drum smells sour, every load picks it up. Run a hot vinegar cycle, scrub the gasket folds, and leave the door open to dry between loads.

How do I stop my clothes from smelling musty after washing?

Move wet loads to the dryer right away, use less detergent, skip the liquid softener, and dry on full heat until the thick seams are dry. Keep the washer door open between loads so the drum dries out. If the dryer is leaving things damp, clear the vent. Those habits stop the smell from starting.

Will the musty smell come back?

Only if the cause comes back. Fresh mildew odor that you treated at the source stays gone. If it returns, something is still feeding it: a dirty machine, a slow dryer, or a damp room the clothes live in. Track down which one and the smell stops for good.

Clothes smell musty after washing? Causes and fixes

Mildew & Musty · By Odor Removal Experts · Updated June 2026 · Cleveland and Northeast Ohio

If your clothes smell musty after washing, the wash itself is usually not the problem. That sour, damp smell is mildew and the residue it leaves behind, and it survives a normal cycle because the load sat wet too long, never dried all the way, or the machine that cleaned it is harboring its own film. Cold water and a scoop of detergent will not kill it, so the clothes come out smelling about the same as they went in.

On the jobs we get called for around Greater Cleveland, the musty laundry complaint almost always traces back to one of a few causes, and most of them you can fix yourself in a weekend. Here is how to sort out which one you have.

The short answer

Clothes smell musty after washing when mildew and its residue survive the cycle, usually because the load sat wet, never fully dried, or the washer itself harbors a musty film. Clean the machine first, then rewash warm with vinegar, skip the softener, and dry on full heat the same day. Hard water, too much detergent, and a clogged dryer vent are the other common causes.

Musty laundry is mildew that survived because the load stayed damp
A film in the washer gasket or dispenser re-coats every load
Rewash warm with vinegar and dry fully the same day
Hard water, excess detergent and a clogged vent also cause it

Why your clothes smell musty after washing

Mildew needs moisture, warmth, and a little time, and a forgotten load of laundry gives it all three. The smell is not dirt. It is the gas the mildew gives off as it feeds on the fibers and the body oils, soap, and minerals trapped in them. Once those byproducts soak into the fabric, a regular wash rinses the surface and leaves the source behind.

The classic trigger is the load left in the washer overnight. A few hours of sitting wet in a warm drum is plenty for mildew to take hold. Towels are the worst offenders because they are thick, they stay damp the longest, and most people fold them away before they are truly dry. That is why a towel can smell fine in the closet and reek the second it gets wet in the shower.

The washer itself is probably part of the problem

Here is the part most people miss. If the machine doing the washing has its own musty film, every load picks it up on the way out. Front-loaders are the usual suspect. The rubber door gasket traps water, lint, and detergent in its folds, and a biofilm grows in there that smells exactly like the laundry you are trying to rescue. Top-loaders hide the same thing in the dispenser drawer and under the agitator. If the empty drum smells sour with the door open, fix that before you rewash a single item. We walk through it in our guide on why the washing machine smells musty.

Wipe the gasket folds. Clean the rubber door gasket folds with a vinegar-damp cloth, then leave the door open to dry.
Run a hot vinegar cycle. Run a hot empty cycle with two cups of white vinegar, or use the machine's clean-cycle setting.
Scrub the dispenser. Pull the detergent drawer and scrub the buildup off it and the cavity behind it.
Air it out between loads. Leave the door and the dispenser open between loads so the drum dries out.

Rewash and dry the load the right way

Once the washer is clean, the load is usually salvageable as long as the smell is fresh and not set in for years. The rules are simple. Wash warm or hot, skip the fabric softener, and dry it all the way the same day.

If the smell still hangs on after a clean wash, our full routine to get the mildew smell out of clothes and towels covers the stubborn cases.

Rewash promptly. The longer a wet load sits, the deeper the mildew sets, so move it to the dryer the moment it stops.
Run a hot cycle with one to two cups of white vinegar and no detergent, then a second normal wash with half a cup of baking soda.
Dry on full heat until the thickest seams are bone dry, not just warm. Damp but folded is how the smell comes back.
Sun-dry when you can. UV and open air knock down musty odor for free.
Skip the dryer sheet and liquid softener. The coating they leave traps moisture and feeds the next round of mildew.

Hard water, detergent buildup, and the dryer vent

Two quieter causes show up a lot in Northeast Ohio homes, and both keep clothes damp or coated long enough for mildew to take hold.

Hard water and too much detergent. Most people use far more soap than the load needs, and the excess never rinses out. It builds into a layer on the fibers that holds moisture and feeds mildew, which is why heavy detergent users get musty towels fastest. Cut your dose and run an occasional vinegar rinse to strip the buildup back off.
A clogged dryer vent. If clothes come out of a long cycle still faintly damp, the vent is probably packed with lint. A blocked vent traps humid air in the drum, so the load never fully dries. Pull the vent hose, clear it, and make sure the exterior flap actually opens when the dryer runs.

When clean clothes still smell musty

Sometimes the fabric loses. If a load sat wet for days, or the items are thick and have been musty for months, the odor can set into the fibers past what a home wash will reach. At that point you are choosing between replacing the items or having them treated.

The same goes for the room. If a whole closet or a basement laundry area smells musty, the clothes are just absorbing what is in the air, and washing them on repeat will not win. That is the kind of job we take on with green, non-toxic professional musty odor removal, using enzymatic and oxidizing treatments, occupied-safe hydroxyl generators, and HEPA and activated-carbon air scrubbing to pull the odor out at the source instead of covering it. We will also tell you honestly when an item is too far gone to save.