How to Clean Your Dryer Vent (Step-by-Step)
Learn how to clean your dryer vent step by step. Prevent fires, reduce energy bills, and fix a dryer that's not heating. DIY guide with tools needed.
Updated April 6, 2026 · 6 min read
Why Dryer Vent Cleaning Matters
Clogged dryer vents cause approximately 2,900 house fires every year in the United States, according to the National Fire Protection Association. Beyond safety, a clogged vent makes your dryer work harder and longer — increasing energy bills by up to 30% and significantly shortening the dryer's lifespan. If your dryer isn't heating properly or your clothes aren't drying, a clogged vent is the first thing to check.
Tools You'll Need
A dryer vent cleaning kit ($15–$30 at any hardware store) includes a long flexible brush that attaches to a drill, plus extension rods to reach the full length of your vent. You'll also need a screwdriver to remove the vent clamp, a vacuum with a hose attachment, and optionally a leaf blower to push lint out from the inside.
Step 1: Disconnect the Dryer
Unplug the dryer (or turn off the gas valve for gas dryers). Pull the dryer away from the wall. Use a screwdriver or pliers to loosen the clamp holding the vent hose to the back of the dryer. Pull the hose off. You'll likely see lint buildup right at the connection point — clean this out first.
Step 2: Clean the Vent From Inside
Insert the vent brush into the wall vent opening (where you just disconnected the hose). Attach it to a drill and spin it while pushing it through the vent duct. The rotating brush loosens lint stuck to the walls of the duct. Pull the brush out and repeat until it comes out clean. Use a vacuum to suck up loosened lint.
Step 3: Clean the Exterior Vent
Go outside and find where the dryer vent exits your home. Remove the exterior vent cover or flap. Use the brush from the outside end as well, pushing it in as far as it reaches. If you have a leaf blower, insert it into the vent opening from inside and blast air through — this pushes any remaining lint out the exterior vent.
Step 4: Reassemble and Test
Reattach the vent hose to the dryer and tighten the clamp. Push the dryer back into position (don't crush the hose). Run the dryer on a high-heat cycle for 10–15 minutes. Go outside and check the exterior vent — you should feel strong, hot airflow. If airflow is weak, there may be a blockage further in the duct that needs professional attention.
How Often to Clean
Clean your dryer vent at least once a year — more often if you do heavy laundry loads, have pets, or notice any of these signs: clothes taking more than one cycle to dry, the dryer getting extremely hot to the touch, a burning smell during operation, or the exterior vent flap not opening during the dryer cycle.
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