Dryer Vent Cleaning Villanova PA - The Villanova Dryer Vent Cleaning Wizard explains more warning signs of poor dryer ventilation. Some people have burned themselves on a hot zipper or metal studs on jeans when removing laundry from the dryer. A properly maintained dryer should not produce heat to this extreme. Other signs that point to danger include the laundry room becoming hot and humid during a dry cycle or the top of the dryer getting hot.