Dryer lint builds up beyond the screen: inside the lint housing, flexible hose, wall duct, and exterior vent. That buildup slows drying, raises heat, and increases dryer fire risk.
This applies to electric and gas dryers vented outdoors. Gas-line warnings apply to gas dryers.
Does this affect you?
Use this if the dryer takes longer, runs hot, smells faintly burnt, or the outside vent flap barely moves.
Clean lint trap and housing
- Remove the lint screen and peel off visible lint.
- Every few months, wash the screen with warm water and dish soap to remove dryer-sheet film.
- Let the screen dry fully.
- Use a flashlight to inspect the lint trap slot.
- Vacuum the slot with a crevice tool or dryer lint brush.
Clean hose and outside vent
- Unplug the dryer or turn off its breaker.
- Pull the dryer forward enough to reach the back.
- Do not strain or disconnect a gas line; call a technician if the dryer must move farther.
- Disconnect the vent hose from the dryer exhaust.
- Use a dryer vent brush kit through the hose from both ends.
- Vacuum the hose and dryer exhaust port.
- Clear lint, leaves, and nests from the exterior vent hood.
- Reconnect the hose without crushing or kinking it.
Loose lint is highly flammable. Keep children and pets away, avoid open flame or sparking tools near lint, and wear gloves because metal duct edges can be sharp.
Clean the full vent path at least once a year for typical use, and more often for heavy laundry, pet bedding, long ducts, or ducts with several bends. For long or roof-routed vents, professional rotary cleaning is often the better choice.
A vent alarm can warn when airflow drops. It is not a replacement for cleaning, but it can catch a clog before drying time and heat become obvious.
Sources
- U.S. Fire Administration – Home Clothes Dryer Fire Safety Outreach Materials (2025)
- Whirlpool – Dryer Venting Requirements and Cleaning (2025)
- GE Appliances – How to Clean Your Dryer Vent (2024)