RUNNING DW WITH NO DETERGENT AND NO FOOD SOIL
Is probably the worst thing you can do to ANY DW, detergent and food oils help lubricate the seal and other vital parts of DWs. We have noticed that folks that per-rinse their dishes usually cut the life of the DW in half. Every thing needs to be done in moderation and with common sense, but no detergent can be as bad as too much, this is why you should always put some detergent in the first detergent cup when you run a full cycle in almost any DW.