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How to Clean a Dryer Vent

Home/Resources/Cleaning & Laundry/Cleaning a Dryer Vent
DH
Written & researched by Derek Holt Home & Appliances Editor
Updated August 2026
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Cleaning a dryer vent is an easy DIY job of 30 to 60 minutes with a brush kit and a vacuum, costing under $30 for tools you reuse for years. It is also one of the more important home safety tasks, because lint buildup is a documented fire hazard and a clogged vent makes the dryer run hot and slow. A standard short wall vent is confident DIY. A long, multi-elbow or rooftop run, or a gas dryer where the gas line is involved, is where you call a pro.

How to Clean a Dryer Vent — The Home Depot

Step-by-step: clearing a wall dryer vent

  1. Unplug and pull the dryer out. Unplug an electric dryer. For a gas dryer, move it gently and do not disturb the gas line. Slide it out enough to reach the duct.
  2. Disconnect the duct. Loosen the clamp and pull the flexible duct off the dryer's exhaust and off the wall stub.
  3. Vacuum the openings. Vacuum lint from the dryer's exhaust port, the duct, and the wall opening as far as the hose reaches.
  4. Brush the duct run. Feed the vent brush into the wall duct, adding rods as you go, and push through to the exterior, twisting to loosen lint. A drill on the brush end speeds stubborn spots.
  5. Clean from outside too. Go to the exterior vent hood, remove any cover, and brush and vacuum from that end to meet the middle.
  6. Check the flap. Confirm the exterior flap opens and closes freely and is not clogged or painted shut.
  7. Reconnect everything. Reattach the duct to the dryer and wall, clamp it, and make sure the flexible duct is not crushed or kinked behind the machine.
  8. Test. Plug in, run the dryer on air-fluff, and confirm strong warm airflow at the exterior hood.
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Tools and materials

You need a dryer vent brush kit, a vacuum with a hose, and a screwdriver. This is core laundry-room maintenance, so it goes hand in hand with keeping the machines and the room itself clean, from the washer alongside it to the detergent you use, and our laundry detergent picks pair naturally with a well-maintained dryer. For the floor lint and dust that collect behind and under the machines, a session with a tool from our steam mop roundup finishes the job once the dryer is back in place.

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Mistakes that leave a vent unsafe

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Safety and when to call a pro

A short wall vent is DIY. Call a professional when the duct is long, has several elbows, runs up through the roof, or you cannot safely reach the exterior hood, since rooftop work is a fall hazard and a partly cleaned complex duct still poses fire risk. On a gas dryer, never disturb or stress the gas line, and if you ever smell gas, leave and call the gas utility. Clothes dryers are a recognized cause of home fires, so if in doubt about a complex run, professional cleaning is money well spent.

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More from this hub: Cleaning & Laundry · Clean a washing machine · Clean a washing machine gasket · Clean a range hood filter · Best laundry detergent · How we rank

Straight Answers

Frequently Asked

How often should you clean a dryer vent?

Clean the full vent run at least once a year, and more often if you do a lot of laundry, dry pet bedding, or have a long or complex duct. The lint trap should be cleared after every load, but that screen only catches part of the lint, and the rest builds up along the duct. Signs you are overdue include clothes taking two cycles to dry, the dryer or laundry room feeling unusually hot, a burning smell, or the outside vent flap not opening. Those all point to restricted airflow from lint buildup.

Why is cleaning a dryer vent important?

A clogged dryer vent is a genuine fire hazard. Lint is highly flammable, and when it builds up in the duct it traps heat and can ignite, which is why clothes dryers are a well-documented cause of home fires tracked by the U.S. Fire Administration. A blocked vent also makes the dryer work harder, running longer, wasting energy and shortening the machine's life. Cleaning the vent removes the fuel, restores airflow so the dryer runs cooler and faster, and is one of the more consequential ten-dollar maintenance jobs in a house.

How do you know if your dryer vent is clogged?

The clearest signs are clothes that are still damp after a full cycle or need two cycles to dry, a dryer top or laundry room that gets very hot, a musty or burning smell during drying, and lint appearing around the lint trap door. Outside, check the vent hood while the dryer runs: you should feel strong warm airflow and see the flap open. Weak or no airflow, or a flap that stays shut, means the duct is restricted and needs cleaning before the next heavy laundry day.

Can you clean a dryer vent yourself or do you need a pro?

A typical short, straight vent through an exterior wall is easy DIY with an inexpensive brush kit. Call a professional when the run is long, has multiple elbows, exits through the roof, or you cannot safely reach the exterior hood, since a rooftop or complex duct is both a fall hazard and hard to clean fully by hand. Gas dryers add a caution: if you disconnect the dryer, do not disturb the gas line, and if you ever smell gas, stop and call the utility. Most single-story wall vents, though, are a confident DIY job.

What tools do you need to clean a dryer vent?

A dryer vent brush kit, which is a round brush on flexible rods that extend to reach the length of your duct, plus a vacuum with a hose attachment. You will also want a screwdriver to loosen the duct clamps and, optionally, a drill to spin the brush for stubborn buildup. That is essentially the whole kit, and it costs well under $30. Measure your vent run first so you buy enough rod length, since a brush that only reaches partway leaves the far half of the duct still packed with lint.