Dishes that come out spotted, filmy, or wet aren't a mystery. In most kitchens, the problem is one of four things: a dirty machine, poor loading technique, wrong products or settings, or hard water. This guide walks through each cause in order, with specific fixes for each one. Work through the stages sequentially. Most households will solve the problem in stages one through three. Those who don't will find out exactly why and what to do about it.