When I was a kid, my mom always told me to rinse the dishes before putting them in the dishwasher. This was especially true for dishware with tacky residue. Peanut butter, cream cheese, frosting â€” these adversaries were simply too powerful for the dishwasher's meek cleanse. Today, still harboring a distrust of dishwashers, I tend to wash my dishes by hand. But I often wonder about the consequences of my sponge-scrubbing ways â€” am I wasting water by avoiding the dishwasher, or saving it?