The science is in. Dishwashers save water — especially if you run them only when you have a full load. Experts will also tell you that you don’t even need to pre-rinse the crusty, sticky residue off ...
A man loads the top rack of a dishwasher. Top racks are best suited for items that are more sensitive to heat. (Carlos Avila Gonzalez/San Francisco Chronicle via Getty Images) The science is in.