Restricted dryer venting is one of the most common — and most preventable — fire hazards in residential homes. Lint is highly flammable, and when it builds up inside the vent duct rather than the trap, it creates exactly the conditions a fire needs: fuel, heat, and restricted airflow.
Warning signs your vent needs cleaning
- Clothes take longer than one cycle to fully dry
- The dryer or laundry room feels noticeably hot during a cycle
- You notice a burning smell during operation
- Lint accumulates around the outside vent hood
- The outside vent flap doesn't open fully when the dryer runs
How often should vents be cleaned?
We recommend a full vent-line cleaning at least once a year for average households, and every six months for larger households or homes with long or complex duct runs (common in Chicago's older housing stock with vents that route through multiple walls).
Why cleaning the lint trap isn't enough
The lint trap only catches a portion of the lint generated during drying. The rest travels through the vent duct, where it accumulates on turns, joints, and any spots where the duct narrows — none of which a homeowner can inspect without disassembling the vent line.
What a professional vent cleaning includes
A thorough service should inspect the full duct run from the dryer to the exterior vent hood, clear any lint buildup, confirm the vent flap opens fully, and verify the dryer is achieving proper airflow — not just a visual check of the lint trap.
If it's been more than a year since your vent was professionally inspected, or you're noticing any of the warning signs above, it's worth scheduling a check before it becomes a safety issue rather than a repair.