How to Clean Dryer Vent: Step-by-Step Lint Removal to Prevent Fires

Cleaning the dryer vent (the duct from the dryer to the outside wall) is the single most important dryer maintenance task and prevents house fires. Dryer vent fires cause approximately 2,900 house fires per year in the US. Step 1: Pull the dryer away from the wall. Disconnect the vent hose from the back of the dryer. Step 2: Use a dryer vent cleaning kit ($15-25, a long flexible brush that attaches to a drill) to brush inside the vent duct from both ends: the dryer connection and the outside wall exit. Step 3: Use a shop vacuum to suction out loosened lint from both ends. Step 4: Check the exterior vent flap - it should open freely when air flows and close when the dryer is off. A stuck-open flap lets cold air, rain, and pests enter the duct. Step 5: Reconnect the vent hose with foil tape (not duct tape - duct tape adhesive fails from heat). Step 6: Run the dryer empty for 15 minutes to blow remaining lint out. How often: at least annually, or every 6 months if you do more than 4 loads per week. Signs your vent needs cleaning: clothes take more than one cycle to dry, dryer is hot to the touch, visible lint around the vent connection, outside flap barely opens during operation.