Dryer Not Drying Enough - Kkenmore Elite

Dryer Takes Forever To Dry Clothes. Articles Of Clothing That Should Take 20 Minutes Take 2-3 Hours To Dry. I Think It Is Heating Element But Can You All Offer A Better Suggestion. Frustrated

Long drying times are an indication of either a failed heating component, or (most likely), a clogged or restricted ventilation system. Check to make sure your vent is clear, from the dryer, to the outside of the house. Also, make sure the lint screen is clear.

How Do I Check Clogged Ventilation System Of The Dryer. Also, Live In A Trailor Does That Make A Difference?