All newer dishwashers have a food grinder and you certainly need a water heater built in. No one keeps their water heated to the proper temp for the dishwasher to do it's job right. Also as soon as the heat cycle is finished check your dishes. They should be almost too hot to touch. This is very important if illness is in the house. No hand washing can come close to sanitizing unless boiling water is poured over the dishes. Boiling water and even fire was most always used to sanitize dishes when washed by hand but no one does that anymore.