I have a Kenmore 90 series electric dryer and have been having problems. About 2 weeks ago it stopped drying. I check the things I'm supposed to, house fuses, coil, thermal fuses, etc. It turned out to be the thermal cut-off, so I replaced it. The dryer worked fine for about 5 loads then stopped heating again. It was the thermal cut-off again. I checked the venting to try to figure out what was causing the overheating and noticed the hose was pinched a little behind the dryer and then cleaned out the hose. I then replaced the cut-off again and it worked great for about 5 loads then stopped heating AGAIN! It is the thermal cut-off again. Do you have any ideas of what I should check next to figure out why this keeps happening?

Check the dryer exhaust vent to be sure it is clean and open all the way to the outside. Something is preventing the heated moistur laden exhaust from leaving the dryer properly causing a overheat condition. The dryer could also be plugged up with lint inside the dryer also.