A couple of months ago we noticed a "fishy" smell from our 16-year old dishwasher. There is no smell from the drain in the sink next to the dishwasher, from the garbage disposal, from the aerator on the top of the sink or from any other sinks in the house. We tried a number of products including Dishwasher Magic, vinegar in a cup while running the dishwasher and baking soda, none of which got rid of the smell. We called a dishwasher repair person who was unable to diagnose the problem. Since the dishwasher was old, we decided to buy a new dishwasher. We had the old dishwasher removed and there was no smell. When the new dishwasher was installed, we replaced the plastic hose running to the drain of the sink. After running the new dishwasher one time, the new dishwasher gave off the fishy smell. We removed the trap from beneath the sink and there was no fishy smell in the trap. Our municipal water department sent a representative who couldnt diagnose the problem. We called our plumber twice but he seemed hesitant to schedule a repair, stating that "smells are really hard to figure out." Help!