Airflow
Dryer vent checks
Lint, long runs, and exterior flaps: the homeowner checks before dry times stretch and moisture goes wrong.
A restricted dryer vent wastes energy, extends dry times, and in the worst cases becomes a fire and moisture problem. On the wet coast it also dumps humid air where it should not go.
Clothes dryers push hot, wet air. That air needs a short, smooth path outdoors. Lint builds up in flexible foil, crushed hose, long runs, and exterior flaps that no longer open.
Quick homeowner checks: Does the exterior flap open when the dryer runs? Have dry times stretched? Is the transition hose behind the dryer crushed? Is there lint smell or damp air at the closet?
Condos and long vertical chases are not always a brush-kit DIY job. If you cannot see the route, hire someone who does this work. Forcing a kit into an unknown chase can make things worse.
Lint is combustible. Recurring overheating, burning smells, or a history of never cleaning a long run are reasons to stop using the dryer until the path is cleared.