How to Clean a Dryer Vent: Step-by-Step Guide
If your clothes take two cycles to dry or the laundry room feels hot and stuffy, your dryer vent is probably clogged with lint. That is more than an annoyance. According to the U.S. Fire Administration, failure to clean dryers is the leading cause of home clothes dryer fires. The good news: you can clean a dryer vent yourself in about an hour with a simple brush kit and a vacuum. Here is exactly how to clean a dryer vent, step by step.
Quick answer: To clean a dryer vent, unplug the dryer, pull it away from the wall and disconnect the duct from the back. Vacuum lint from the dryer exhaust port and duct ends, run a dryer vent brush through the full length of the duct, then clear lint from the outside vent cover. Reconnect everything and run the dryer to confirm strong airflow outside. Do this at least once a year.
Signs Your Dryer Vent Needs Cleaning
- Clothes take longer than one cycle to dry
- The dryer or clothes feel very hot to the touch
- A burning or musty smell when the dryer runs
- Lint building up around the lint trap or behind the dryer
- The outside vent flap barely opens when the dryer is on
- It has been more than a year since the last cleaning
What You Need
- A dryer vent cleaning brush kit (flexible rods that connect together)
- A vacuum with a hose and crevice tool
- A screwdriver or nut driver for clamps
- Work gloves and a dust mask
- Foil tape for resealing joints if needed
How to Clean a Dryer Vent Step by Step
1. Clean the lint trap first
Pull out the lint screen, remove the lint and vacuum the slot it sits in using a crevice tool or a long, narrow lint trap brush. If the screen looks clogged with residue from dryer sheets, scrub it with warm soapy water and let it dry.
2. Turn off and unplug the dryer
Unplug an electric dryer. For a gas dryer, also turn off the gas valve and be very careful not to damage the gas line. Gently slide the dryer away from the wall.
3. Disconnect the vent duct
Loosen the clamp holding the duct to the back of the dryer and pull it off. Vacuum lint from the dryer exhaust port and from the end of the duct.
4. Brush and vacuum the duct
Attach the brush head to a rod, feed it into the duct and twist it in the direction recommended by the kit while pushing forward. Add rods as you go. Pull it back out slowly and vacuum the lint that comes loose. Some kits attach to a power drill, but keep the drill on a low speed so you do not damage the duct.
5. Clean the outside dryer vent
Go outside and find the vent hood. Remove the cover or screen if possible, pull out lint by hand, and run the brush in from the outside to meet the inside section. Check that the flap opens and closes freely and that no birds or rodents have built nests inside.
6. Reconnect and test
Reattach the duct with the clamp, seal loose joints with foil tape (not regular duct tape) and push the dryer back without crushing the duct. Run the dryer on air-dry and check that air flows strongly from the outside vent.
How Often Should You Clean a Dryer Vent?
| Part | How often |
|---|---|
| Lint filter | After every load |
| Lint trap slot | Every few months |
| Full dryer vent duct | At least once a year |
| Large family, pets or long duct runs | Every 6 months |
Tips to Keep Your Dryer Vent Clean Longer
- Use rigid or semi-rigid metal duct instead of flexible plastic or foil duct, which sags and traps lint.
- Keep the duct as short and straight as possible.
- Do not overload the dryer.
- Avoid storing items behind the dryer that can crush the duct.
- Consider a professional cleaning if your duct is very long, runs through the roof or you notice a burning smell.
Frequently Asked Questions
Can I clean a dryer vent myself?
Yes. Most homeowners can clean a standard dryer vent with an inexpensive brush kit and a vacuum. Call a professional for long, roof-mounted or hard-to-reach vents.
Can you clean a dryer vent from the outside?
You can clean part of it from outside by removing the vent hood and brushing inward, but for a thorough job, clean from both ends.
How much does professional dryer vent cleaning cost?
Prices vary by location and vent length, but many households pay roughly $100 to $200 for a standard cleaning.
The Bottom Line
Learning how to clean a dryer vent is one of the easiest ways to make your home safer and cut drying time. Clean the lint filter every load, brush out the full vent once a year, and check the outside flap regularly. While you are maintaining your home, also learn how to clean a fan for cleaner air.
This guide is for general information. If you have a gas dryer, smell gas, or are unsure about any step, stop and contact a qualified technician.
