I found that mine had a small buildup of cooking grease in the bottom of the oven. I used some solvent and cleaned it. I also cleaned the bottom side of the turntable and the three magnets on the underside of the turntable. The magnets run very close to the bottom of the oven and a small amount of crumbs or grease will cause it not to turn very well.
Ron in Mississippi, January 2009
