Dryer back over plug is too hot, smells like its burning, burns to touch, what's up? Just started, nothing unusual with the loads of clothes or anything...just when it heats up, it is way too hot...

1. Ok, bare with me...
   Is there any visible SMOKE with the smell? If so turn it off and call a repairman.
2. Verify that the clothes drum is turning freely. If it is not, call a repairman.
   
3. 
   Otherwise;
   I recommend removing all clothing from your dryer and to carefully follow these instructions.
   
4. With the machine off, Clean the dryer filter well. Set dryer to the MAXIMUM heat setting on a 30 min TIMED cycle.
5. Start the cycle.
6. Make close observations in short intervals of time.
7. At the end of your timed cycle determine if the smell has changed more or less.
8. With the dryer off, Locate the electrical socket/plug of the device if it is an electric machine. place your hand on it to determine it's temperature. It should be no more than Luke-warm to touch.
9. If it is uncomfortably warm to touch you should consider contacting an electrician to determine the working load of the wiring to the device.
10. If the wiring/plug test is deemed adequately cool, ventilate the dyer area well for an hour and repeat steps 3-7, the hot - empty test again. The smell should diminish.

Lint and other clothes debris can get pulled into contact with the dryer's heating element and it will burn or smolder. If a piece of elastic rubber gets into contact with the heating element, the smell will be strong and may last a long time.
If it is still bothersome after the burn-out procedure, it will have to be taken apart and at least cleaned or the element replaced. This is not usually covered by warranty as it is considered a USER PROBLEM. Sorry.

there should be a fan in the unit that blows air over the element and through the clothes
there should also be a thermostat that sets the element temp to low mild or hot according to the switch on the front

You will need to open the dryer ans clean the internal duct work.

Check to see if any thing got caught up in the blower assembly. This is done thru the back of the dryer.

Check the dryer vent .The vent is stopped up,in the vent,or in the inside of dryer,in the lint hopper.Clean it out and unstop the dryer,and the vent.

actually i've had this exact problem.
the burn mark is from clothes sitting on that metal piece as soon as the dryer shuts off and that is still hot. then once it burns the clothes, fabric is pulled through that metal opening and falls on the other side which builds up on the bottom of the dryer. you only need take off the bottom of the dryer and vacuum it out or remove it by hand. taking it apart is difficult and can be dangerous with all the wiring inside, so try not to take off any wires, otherwise when you plug it back in it could ground to the outside of the dryer and blow the motor.

YOUR BELT IS PROBABLY BURNING UP

NEED TO REMOVE OUSTIDE HOUSING AND REPLACE

BEFORE TACKLING, HAVE SOMEONE TILT MACHINE BACK AND CHECK THAT NOTHING IS INTERFERING WITH TENSIONER PULLY

replace the belt

I Think the belt got binded on the motor spindle and the burning smell was the belt burned through by the spinning spindle

Have you painted or stained in your house or apartment recently? The smell gets everywhere, dryer, stove, heating unit. I recently primed with Kilz and the clothes from my dryer smelled burned. When I called for service, it was the first question the service person asked and said they made a lot of useless trips only to find nothing wrong with the appliance. That was my case. I had to rewash clothes and let the dryer run with towels for a while