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Dryer Smells Musty? Clean the Drum and the Door Seal

A musty dryer usually has damp lint, a dirty drum or a clogged vent. Clean them in 20 minutes, and know when a smell means stop and unplug.

By Jamilur Rahman Updated November 5, 2026 · 7 min read

Time
20 min
Cost
Under $20
Difficulty
Easy
The inside of an open clothes dryer with a patch of lint on the drum wall and the door seal edge in view
In this guide
  1. Quick answer
  2. Free vs. permanent fix
  3. What you'll need
  4. Why it happens
  5. Try this first (free)
  6. When free fixes aren't enough
  7. Buy the fix
  8. Dryer smells bad? Match the smell to the cause
  9. How to stop dryer from smelling bad, month after month
  10. Dryer smells like wet dog or clothes dryer smells musty: where to look
  11. What to skip
  12. FAQ
  13. Related problems

Quick answer

If your dryer smells musty, the cause is usually damp lint, residue on the drum and door seal, or a clogged vent that traps moisture. Unplug it, wipe the drum and door seal with vinegar and water, wash the lint screen, vacuum the lint housing and clear the vent. Drum cleaning wipes make this quick, and a vent brush clears the moisture trap. If it smells like burning, stop and unplug the dryer.

Free fix vs. permanent fix

Free fix · 20 minutes

Vinegar wipe, lint screen and vent check

  • Unplug it, then wipe the drum and door seal with vinegar and water
  • Wash the lint screen with dish soap and dry it
  • Vacuum the lint housing and the vent hose
  • Run it on air-only for 10 minutes, then leave the door open

How long it lasts: Weeks to months if the vent is clear. The smell returns when wet clothes sit in the drum or the vent clogs again.

Most readers choose Permanent fix
Dryer drum cleaning wipes (illustration)
Illustration

Dryer drum cleaning wipes

The vinegar wipe is free, but you have to mix, wring and carry cloths, so it gets skipped. Pre-moistened drum wipes take two minutes, so the monthly wipe actually happens. Pair them with a clear vent to keep the smell away.

How long it lasts: A two-minute habit that keeps residue from building up. Use them monthly or after a damp load.

Check price on Amazon

As an Amazon Associate I earn from qualifying purchases.

What you'll need

  • White vinegar and warm water mix

    Half and half in a spray bottle

    You have it

  • Microfiber cloth

    Dampen the cloth, do not spray the drum

    You have it

  • Dish soap and soft brush

    For washing the lint screen

    You have it

  • Vacuum with a crevice tool

    For the lint housing and vent hose

    You have it
  • Our pick
    Dryer drum cleaning wipes (illustration)
    Illustration

    Dryer drum cleaning wipes

    A quick monthly wipe without mixing anything

    Check price
  • Dryer vent cleaning brush kit (illustration)
    Illustration

    Dryer vent cleaning brush kit

    For a vent that stays clogged

    Check price

Why it happens

1

Damp lint and residue on the drum

Lint, fabric softener and detergent film stick to the drum walls and the door seal. When they get damp, they grow mildew and smell musty.

2

Wet laundry that sat too long

Clothes left wet in the washer or in the drum grow a smell, and the dryer walls keep it afterward.

3

A clogged vent

If the vent is blocked, steam cannot leave. The drum stays humid after each cycle and smells musty. A blocked vent also makes clothes slow to dry, and it is a fire risk.

4

A film on the lint screen

Fabric softener and dryer sheets leave a film on the screen that blocks airflow and holds damp lint.

5

A nest or something dead in the vent

Birds and rodents nest in outside vents. A nest or a dead animal causes a wet-dog or rotten smell that no cleaning inside will fix.

Try this first (free)

Do these in order, starting with the simplest.

  1. Unplug the dryer and empty it

    Unplug the dryer, then remove anything left in the drum. Clean it while it is cool.

  2. Wipe the drum and door seal

    Tool used: White vinegar and warm water mix

    Dampen a cloth with half vinegar, half warm water, then wipe the drum walls, the door lip, the seal and the door glass. Do not soak the inside of the machine.

  3. Wash the lint screen

    Tool used: Dish soap and soft brush

    Pull the screen and scrub it in hot water with dish soap, then rinse and dry fully. A film from softener sheets blocks airflow.

  4. Vacuum the lint housing and vent

    Tool used: Vacuum with a crevice tool

    Vacuum the slot where the screen sits. Then pull the dryer out, disconnect the vent hose and vacuum or brush it out. Lint here holds moisture.

  5. Check the outside flap, then air it out

    Make sure the flap outside opens freely and nothing is nesting in it. Then run the dryer on air-only for 10 minutes and leave the door open to dry.

When free fixes aren't enough

If the smell is back in a week or two, the vent is the likely cause. Long, crushed or foil-flex runs hold lint and moisture, and a brush kit clears them. If clothes need more than one cycle to dry, treat that as a vent problem too. Never ignore a burning smell: stop, unplug the dryer and check the lint trap and vent before using it again. If you smell gas or rotten eggs, leave the house and call your gas company.

Buy the fix

Still stuck after the free fixes? These are the products we would look at.

Our picks compared
PickProductFixesWho it's forBuy
Best pick
Dryer drum cleaning wipes (illustration)
Illustration
Dryer drum cleaning wipes
residue and lint film on the drum that holds damp smells Anyone who wants a two-minute monthly wipe instead of mixing vinegar. Check price
Upgrade pick
Dryer vent cleaning brush kit (illustration)
Illustration
Dryer vent cleaning brush kit
lint blocking the vent, so moisture stays in the drum People whose clothes take two cycles to dry, or whose vent run is long. Check price
Best pick
Dryer drum cleaning wipes (illustration)
Illustration

Dryer drum cleaning wipes

Fixes: residue and lint film on the drum that holds damp smells

Look for: Made for dryer drums, not general wipes; Large enough to wipe the full drum and door seal; Leaves no residue for clothes to pick up.

Who it's for
Anyone who wants a two-minute monthly wipe instead of mixing vinegar.
Honest downside
You are happy with vinegar and a cloth. The free method works just as well.
Check price on Amazon
Upgrade pick
Dryer vent cleaning brush kit (illustration)
Illustration

Dryer vent cleaning brush kit

Fixes: lint blocking the vent, so moisture stays in the drum

Look for: Flexible rods that connect for long vent runs; A brush head sized for a 4-inch vent; Rods strong enough to push through lint without snapping.

Who it's for
People whose clothes take two cycles to dry, or whose vent run is long.
Honest downside
Your vent is short and clears with a vacuum, or you are not comfortable moving the dryer. A pro can do the vent for you.
Check price on Amazon

As an Amazon Associate I earn from qualifying purchases. We don't show prices because they change, so use the button to see today's price.

How we picked: How we picked: this page is based on dryer manuals, fire-safety guidance on dryer vents, and the problems people report in reviews of drum wipes and vent brushes. We do not test products by hand.

Dryer smells bad? Match the smell to the cause

  • Musty or mildew: damp lint, drum residue or a blocked vent. This page.
  • Wet dog: damp lint, or a nest in the vent.
  • Burning: stop, unplug, and check the lint trap and vent.
  • Gas or rotten eggs: do not use it. Leave and call the gas company.

How to stop dryer from smelling bad, month after month

  • Clean the lint screen after every load.
  • Wipe the drum and door seal once a month.
  • Leave the door open between loads so the drum dries.
  • Do not leave wet laundry sitting in the washer or the dryer.
  • Clear the vent at least once a year.

Dryer smells like wet dog or clothes dryer smells musty: where to look

Start at the places that hold damp: the door seal and lip, the lint screen and its slot, then the vent hose and outside flap. Smell at each spot with the dryer unplugged. A musty smell strongest at the door points to residue, and a wet-dog smell strongest at the vent points to lint or a nest.

What to skip

Dryer sheets and scented sprays

Scents cover the smell and do nothing for the cause. Fabric softener sheets also leave a film on the screen and drum that holds more lint and damp.

Frequently asked questions

Why does my dryer smell like mildew?
Damp lint and residue on the drum and door seal grow mildew, and a clogged vent keeps the drum humid. Clean the drum, door seal and lint screen, then clear the vent.
Why does my dryer stink even when it is empty?
The smell sits in the drum film, the lint housing or the vent, not in the clothes. Wipe the drum and seal, vacuum the lint slot and hose, and run it empty on air-only afterward.
Dryer smells like wet dog: what is it?
Damp lint on the drum or in the vent is the usual cause. A nest or dead animal in the outside vent is another, so check the flap outside.
Why does my dryer smell, and is it dangerous?
A musty or mildew smell is not dangerous. A burning smell is. Stop, unplug it and check for lint on the heating parts and in the vent. A gas smell means leave and call the gas company.
Do dryer wipes get rid of the smell?
They clean residue off the drum, which removes one common cause. If the smell comes from a clogged vent, you still need to clear the vent.

As an Amazon Associate I earn from qualifying purchases. Affiliate disclosure

Dryer drum cleaning wipes (illustration)
Illustration

Our pick: Dryer drum cleaning wipes

Check price