Probably has a lot to do with water quality. My well water is softened and my dishwasher (stainless inside) always looks spotless. I do use a drying agent as well, but it looked good even before we started using it when we first moved in.
Now, the drain screens, yea they get a little nasty every once in a while.
Now, the drain screens, yea they get a little nasty every once in a while.