How often should you clean the dryer vent?
Clean the dryer vent duct at least once a year — every six months with heavy use (NFPA). This is a safety task, not just efficiency: dryers cause roughly 15,500 US home fires a year, and the leading cause is failure to clean lint. Warning signs it's overdue: clothes take two cycles to dry, the dryer gets very hot, or you smell a burning odor.
The vent duct, not just the lint trap
Cleaning the lint screen after every load is essential but isn't the same as clearing the vent duct that runs to the outside — that's where the dangerous buildup happens. Longer or bendier duct runs clog faster. A vent-cleaning brush kit handles most home runs; long or roof-terminating vents may need a pro.
Signs it's clogged
Clothes still damp after a full cycle, the dryer or laundry room unusually hot, a musty or burning smell, or the outside vent flap barely opening while running all point to a restricted vent. Any of these means clean it now.
When to call a professional
- • Long, inaccessible, or roof-terminating vent runs — hire a duct-cleaning pro.
- • Any scorching smell from the dryer — stop using it until the vent is cleared and checked.
Common questions
- Is a clogged dryer vent really a fire risk?
- Yes — lint is highly flammable and restricted airflow lets heat build up. Failure to clean lint is the leading cause of dryer fires.
- Can I clean it myself?
- For a short, accessible duct, a brush kit works. Long runs or roof terminations are safer done by a pro.
Sources
- Clean the dryer vent at least once a year (every 6 months for heavy use) to reduce fire risk. Tier 2 (standards/extension)
NFPA (via NPS) · verified 2026-07-26 - Clothes dryers cause about 15,500 U.S. home fires a year; the leading cause is failure to clean lint (~32%). Tier 2 (standards/extension)
CPSC/NFPA (via NPS) · verified 2026-07-26