This KitchenAid dishwasher was bought in 1991 and I have not had one ounce of trouble from this machine. (This is my third KitchenAid Dishwasher) Luv the KitchenAid. However lately there is a smell in the bottom of diswaser around the base of the component in bottom. I thought I might look through the owners manual and see if I could troubleshoot. thank you very much