Maytag dryer heats but won't dry

My Maytag dryer heats and tumbles but does not dry clothes. Some loads can run for 1.5 hours and still be very damp. The dryer gets very hot inside. It does not seem to be exhausting the heated air out the vent pipe. It also makes more noise than normal when it tumbles. Any help very appreciated ???:confused:

Here are your parts
Replacement parts for Maytag SDE3606AYW DRYER- ELE | AppliancePartsPros.com

Unplug the unit and disconnect it from the vent system.
Now try a run.
If it now dries OK odds are the vent system needs checking/cleaning.
Be sure to check that the louvers on the outside of the house open correctly.

If you do not want any lint in the house.
Take a pair of pantyhose.
Put one leg into the other and then attach this to the dryerโ€™s vent.
Leave enough room so the pantyhose can balloon out like a windsock.

Both the above will let you check the temperature and the air flow.

Note: The above is not recommended for gas dryers due to carbon monoxide concerns.