A dryer that is hot to the touch while running can be a sign of incorrect air flow. A clog in the clothes dryer vent, improper vent setup, and even an obstruction near the vent cap can cause a hot dryer. If you discover that you have a hot clothes dryer, see to it the exterior vent cap is not obstructed or covered with a cage, which can increase lint collection, and have your dryer vent cleaned by an expert once a year.

Dryer Vent Cleaning Hebron warns That a Hot Dryer Is The Indication Of a Bigger Problem