Why does lint keep building up around my dryer even after cleaning the vent in my GTA home?

Lint accumulating around your dryer despite regular vent cleaning usually means the exhaust duct has a leak, disconnection, or blockage somewhere between the dryer and the exterior wall — lint that should be exiting the home is instead escaping into the laundry area through a gap in the duct system. This is more than a nuisance in a GTA home — it is a fire hazard and an indoor air quality concern that needs prompt attention.

The most common cause is a disconnected or loose joint in the vent duct. The transition hose behind the dryer is the most frequent failure point. Every time the dryer vibrates during operation or is pulled out and pushed back for cleaning, the connection between the dryer exhaust port and the vent hose can loosen or disconnect entirely. If there is even a small gap at this joint, lint-laden exhaust air escapes into the laundry room rather than travelling through the duct to the exterior. Pull the dryer away from the wall and inspect the connection — you may find the hose has slipped off the dryer port or the wall collar, or a clamp has come loose. In older GTA homes where the vent duct runs through floor joists or wall cavities, a disconnected joint deeper in the run can send lint into hidden spaces where it accumulates unseen, creating a serious fire risk.

A second common cause is a blockage or restriction further along the vent run that increases back-pressure enough to force exhaust air out through leaky joints closer to the dryer. Even if the vent was cleaned recently, a crushed section of duct, a bird nest in the exterior cap, or an ice blockage at the termination point during a Toronto winter cold snap can restrict airflow enough that exhaust pressure backs up and lint escapes through any available gap. Check the exterior vent cap while the dryer is running — you should feel strong, warm airflow. If the flap barely opens or airflow is weak, there is a restriction that cleaning alone may not have resolved.

A damaged or missing lint trap is another possibility. If the lint screen has a tear, hole, or does not seat properly in its housing, significantly more lint enters the exhaust duct than the system is designed to handle. Inspect the lint screen carefully — even a small tear allows a surprising amount of lint to bypass the trap. Replacement lint screens are inexpensive and dryer-model-specific.

To fix the problem, start by reconnecting and securing the transition duct behind the dryer with a proper clamp and foil tape at both ends. Replace any flexible vinyl or foil hose with semi-rigid aluminum for this transition section — it holds its shape and resists disconnection during vibration. Have a professional inspect the entire vent run for disconnected joints, crushed sections, or hidden damage, especially if your duct passes through walls or floor cavities. A full dryer vent inspection and repair in the GTA typically costs $150 to $400 depending on the issue. If the duct is old flex hose throughout, replacing the full run with rigid aluminum ($200 to $600 installed) eliminates the lint accumulation problem at its source. Find a ductwork contractor through the Toronto Construction Network for a professional assessment.