Dryer Vent Maintenance in Houston, TX

Why does the dryer still take three cycles after a cleaning?

Usually because the duct was not the only problem. A vinyl or foil flex hose crushed behind the dryer kills airflow the moment the machine is pushed back against a shallow closet wall. We see this often in utility rooms off the garage in 1950s–70s ranch homes. Rigid metal or a short semi-rigid elbow fixes it permanently. The brush work means nothing if the last four feet stay kinked.

The other common cause is run length. Two-story subdivision homes from the 1990s–2000s often route up through the attic and out a roof jack. Every elbow counts against the 35-foot equivalent-length limit. Count the elbows before blaming the dryer. Some runs were marginal the day they were built.

Roof terminations fail at the hood, not the middle. Wet lint pastes onto the screen. Birds nest behind the flapper. From the attic you cannot see either, so check the termination from outside.

Houston humidity changes the schedule. Damp lint packs tighter than dry lint. Annual is the local baseline. Roof-terminated long runs, pet households, and large families usually need it sooner. Back-drafted humid air feeding mildew on laundry-room drywall is the warning sign.