Cleaning the lint screen after every load is a good habit, but it doesn’t catch everything. Lint slowly builds up inside the duct that carries hot air outside. That buildup makes your dryer work harder, and lint is very flammable. Learning how to clean a dryer vent once a year is one of the best safety jobs you can do at home.
Signs Your Dryer Vent Needs Cleaning
Watch for these clues:
- Clothes take more than one cycle to dry
- The dryer or laundry room gets unusually hot
- A burning smell while the dryer runs
- The flap on the outside vent barely opens when the dryer is on
- Lint collects around the outside vent opening
If you notice any of these, clean the vent soon. If you smell burning, stop using the dryer until the vent is cleared.
Tools for Cleaning a Dryer Vent
- Dryer vent cleaning kit with flexible brush rods that connect to a drill
- Vacuum with a hose attachment
- Screwdriver or nut driver
- Foil tape for resealing joints
- Work gloves and a dust mask
Vent cleaning kits are inexpensive and reusable, so they pay for themselves quickly.
Step 1: Unplug the Dryer and Pull It Out
Unplug the dryer. For a gas dryer, turn the gas valve off and be very careful not to strain or kink the gas line when moving the machine. If you’re not comfortable working around a gas connection, have a pro handle this part.
Slide the dryer away from the wall so you can reach the duct.
Step 2: Disconnect the Duct
Loosen the clamp holding the duct to the back of the dryer and pull it free. Vacuum out the lint from the dryer’s exhaust port and the end of the duct.
Step 3: Brush Out the Vent Duct
Feed the brush into the duct, working toward the outside. Attach the rods to a drill and run it at low speed, pushing and pulling slowly. Always spin the drill clockwise so the rods don’t unscrew inside the duct.
Pull the brush back often and clear the lint. Keep going until very little comes out.
Clean From the Outside Too
Go outside and remove the vent cover if you can. Brush inward from that end, then clean the flap so it opens and closes freely. Birds and rodents sometimes nest in outdoor vents, so check for debris.
Step 4: Clean the Lint Trap Housing
Pull out the lint screen and use a narrow vacuum attachment to clean the slot it sits in. Wash the screen with warm soapy water if dryer sheets have left a film on it.
Step 5: Reconnect and Test
Reattach the duct and tighten the clamp. Seal loose joints with foil tape, never duct tape, which can fail with heat. Push the dryer back without crushing the duct, then run it for a few minutes. Check that air flows strongly out of the outside vent.
How Often Should You Clean a Dryer Vent?
Once a year is a good rule for most households. Big families, homes with pets and long duct runs may need it every six months. Mark it on your calendar next to other yearly jobs, like testing smoke alarms, so it doesn’t slip.
Choose the Right Dryer Duct
If your duct is thin white plastic or foil accordion tubing, replace it. Semi-rigid or rigid metal duct is safer and traps less lint. Keep the run as short and straight as possible.
More Home Maintenance Guides
Add vent cleaning to your seasonal home maintenance checklist so you never forget it. While you’re thinking about efficiency, learn how to weatherstrip a door. If the laundry room outlet or switch looks worn, learn how to replace a light switch safely. Stocking up on tools? Our drill bit guide for beginners and essential DIY tool kit are good places to start.
