This is what I was going to say, and I'll add that when we mess this up I generally take the dishes out of the dish rack where they are drying and put them into the dishwasher, because all evidence I have points to the fact that I don't really have the same cleaning philosophy as my cleaners. They likely didn't use the same soap or implements as I would to clean the dishes, and while I don't care wrt the rest of the house that our cleaning methods might be different, for some reason it icks me out when thinking about tableware.