My Whirlpool dishwasher recently stopped getting the dishes completely clean and sometimes leaves a white or gray residue on the the flat surface on some dishes (like coffe cups turned upside down). No change to brand or amount of detergants or drying agents used. I suspected that the heating element was not kicking in to heat the water to 140 degrees. Water at the tap is 135 degrees. To test, I put a glass with a candy thermometer in the dishwasher, ran the normal cycle, and checked it 5 minutes into the wash and rinse cycles, dumped the water out of the glass, and check again 5 minutes later. The water temp was only 125 during wash and slightly higher during rinse. I also could tell by touch that the heating element was not hot. However, the heating element gets very hot during the dry cycle. I tested the thermal fuse with an analog volt/ohm meter on the Rx1 scale. Got a reading close to 0, which is good continuity I believe. (I am not an expert at all.) What would you recommend? The dishwasher just turned 10 years old, but I don't want to replace it right now if possible.