How Often Should You Clean Your Dryer Vent?

Short answer: once a year, minimum. Longer answer: if your dryer takes two cycles now, your clothes come out hot and damp, and you figured the machine is just getting old, your vent is probably packed with lint and you are closer to a fire than you think.

The real schedule

Once a year for most households. Twice a year if you do a lot of laundry, have pets, or have a long vent run with bends in it. Every bend in the vent is a place lint collects. Short straight vent to an outside wall? You are in good shape. Long run through the attic with three elbows? Clean it more often.

The warning signs

Two cycles to dry one load. Clothes hot and damp at the end. A burning smell when it runs. The laundry room hotter than it used to be. The outside vent flap barely opening. Any one of these means restricted airflow, and restricted airflow plus lint plus heat is how laundry room fires start.

The two-minute check tonight

Pull the dryer away from the wall and look at the vent connection. Is it crushed? Disconnected? Packed with lint? Go outside and find the vent cap. Put your hand near it while the dryer runs. You should feel strong warm airflow. Weak trickle means blockage somewhere in the run.

The full clean-out

Disconnect the vent from the dryer. Run a vent brush kit through from both ends. Vacuum everything you pull out. Outside, clear the cap of lint and make sure the flap moves freely. Reconnect with metal clamps, not screws, because screw tips inside the vent catch lint. Then run the dryer empty for ten minutes and check the airflow again.

Why this matters

Lint is one of the leading causes of house fires in America. It packs into the vent a little at a time, the dryer runs hotter and hotter, and one day the heat finds the lint. Thousands of fires a year. The warning signs sit there for months while everyone ignores them. Do not be everyone.