Clothes not drying completely, still damp when taken out.

A dryer moisture sensor can stop working without notice, until you notice your clothes being over dried or still wet at the end of the cycle. It is a good practice to test the dryer moisture sensor periodically. There are two types of moisture-detecting sensors for dryers. Once you understand how they work you will see how to test each one.
1. Sensor BarThese sensors contain digits that protrude outwardly. They work on an electrical current and the moisture from the clothing.
The first step to test is to place completely dry clothes in the dryer and turn on the dryer; it should run for a few moments and then shut down right away.
Secondly, place damp clothes into the dryer, turn on the dryer and watch the timer. As the clothes begin to dry the timer will move and shut off.
2. ThermostatThe timer is regulated by the thermostat. The thermostat rests in a closed position. To test this type of moisture sensor, place damp clothes in the dryer. Watch the timer; as the clothes begin to dry, the thermostat should open and the timer will move forward ,eventually shutting off.

This problem may be the result of a dirty lent filter which if clogged will short cycle the dryer and the clothes will still be damp when done. Also a dirty exhaust pipe (usally 4") will prevent the clothes from drying correctly. Make sure that the air is leaving the machine. To do this you have to go outside when the machine is running.

Could be the timer switch is not giving you the right drying cycle.
Try to change dryer cycles from the one setting that you would normally use to a different cycle and see what happens.
Or if you have a timed type timer switch, put it to 60 minutes and see if that helps. If it does then you may need to replace the timer switch.
Good luck,
I hope this helps

need to check your vent duct. if clogged it won't let the air flow through the dryer needed to dry your clothes.

I had the same problem with mine. My wrinkle free setting some how got turned off. As soon as I turned that back on machine kept running and dried the clothes fine.

on which setting are you running it. If you are running this on the timed setting then its obviously a faulty timer. Sounds to me though that you are running it on its automatic cycle. If this is the case it could be a couple of things. Somewhere on ur beast there is a moisture sensor, this is what advances the timer and tells it to stop. This may be faulty or it could be that ur vents are indeed clogged which would trap the moisture in and result in the long dry times. The simplest way to go about this one would be to clear the air flow and see if the problem persists.( this means pulling out the dryer clearing all the vents, if using the flexible ones make sure they are not binding up while setting dyer in place. Also if there is a vent that runs through the wall as well you can clear this by removing exterior vent). good luck

Sounds like your heater element is going out. 

Clean the vent hose and vent outlet

check you vent hose all the way to outside. make sure not blocked or kinked.

When you try to restart do you hear a motor running? If you do hear that sound and the dryer does not turn your belt could be the problem. (broken)