In homes that have a dryer vent terminate on a roof, it is vitally important to get onto the roof and clean the space between the damper (a flap that opens while the dryer is running and closes when the dryer turns off) and the top of the gooseneck. Lint builds up there and can force the damper to stay closed or jams it from working. Without anywhere to go, lint will build up within the vent. Without proper ventilation, the dryer has to work harder and gets much hotter. This not only shortens th