Kenmore Elite HE4 does not dry the cloths all the

if dryer is filled with lint or vent line is blocked the clothes will not dry correctly,shop vac is great for this it sucks and blows,vac out what you can see and then blow out the lint from back and on motor,clean out the lint duct,where ever you pull out your lint filter either on top or inside dryer you have to clean out the duct.now go outside and check the flapper,if it isn't blowing open or hardly opening i use a leaf blower and take off the vent line from the back of dryer and blow it out,good luck