I'm about to purchase a used KitchenAid KUDK031TWH3. I had a simalar one, loved it but it started leacving food on dishes and not pumping correctly. I was told this was odd for a Kitchenaid since they usually last for years. I purchased it at appliace direct and that was t was told the problem probably was. I really liked mine, This one in a little newer..Has anyone heard of this being a bad modle?