Things You Thought Could Go in the Dishwasher But Really Shouldn't
Cast-iron, enameled-cast-iron, and copper pots and pans are on the never list. Why? Cast iron rusts; enameled cast iron chips; copper dents.
Formal dishes and nice flatware can get worn with repeated washings. Rule of thumb: If it’s something you would cry over harming or losing, don’t put it in. (If you do put sterling silver in the dishwasher, use about a tablespoon of detergent and don’t mix it with stainless-steel flatware; a chemical reaction between the metals can discolor the silver.)