I'm not a handy guy, but I'd like to help mom out with the dryer, a Maytag DE 806. I visited her today, and noticed that the door switch makes a buzzing sound. I thought I'd attempt to test the switch, but I couldn't get to it. I was able to lift off the top panel, but couldn't reach the sensor. I'd like to test it, and if it's not working I could hit it with some deoxit. I figure I could replace it, and I'd appreciate any tips you have to share.