Sometimes the dishes smell rancid after washing. Turns out we were using "too" much detergent (We were using the recommended amount of liquid soap and for a while the little prepacked pods). Could be related to the hardness of the water. I tried everything I could think of, had a repair guy come test the appliance (Bosch) and everything checked out ok. He suggested testing the water and/or using less detergent. We have been using the "min" amount for the last 10-20 loads, and they come out smelling clean and fresh (a slight pleasant soap smell).