The lint screen catches most fibers, but dust can still collect in the screen housing and reduce airflow. Cleaning that cavity with the appliance unplugged is a practical maintenance task that helps the dryer work efficiently and makes it easier to notice a deeper vent problem.
Disconnect and inspect
Unplug the dryer before reaching into the housing. Remove the lint screen and look for a torn mesh, a damaged frame, or a buildup that extends beyond the opening. If the dryer is gas-fired, do not disturb the gas connection while accessing the filter area.
Remove loose lint
Use a narrow vacuum attachment designed for appliance cleaning. Work slowly along the sides and bottom of the housing without forcing the nozzle against hidden sensors or screens. A flexible lint brush can loosen a stubborn mat, but withdraw it carefully so it does not snag.
Check the airflow path
Clean the lint screen itself with a soft brush and occasionally wash away invisible fabric-softener film with mild soap, then dry it fully. The screen housing is only one part of the route; a long drying time, hot cabinet, or lint around the exterior vent calls for a full vent inspection.
Restore and monitor
Replace the dry screen, reconnect power, and run a short cycle while checking for normal airflow. Never operate the dryer without its filter. If the dryer overheats, repeatedly trips, or still takes too long to dry, stop using it until the vent and appliance are evaluated.