WHAT ITEMS SHOULD NOT GO IN THE DISHWASHER?
Some items to avoid placing in the dishwasher include, but are not limited to cutting knives, nonstick or aluminum cookware or some pots and pans, cast iron, antiques, insulated drinkware, wood, fine china with metallic trimmings or ceramics with hand painted decorations shouldn’t go in the dishwasher. Additionally, plastic that does not explicitly state that it's dishwasher safe should not go in the dishwasher either.
Also, you may want to hand wash vintage or special drinkware or wine glasses instead of putting them in the dishwasher. Depending on your water, glassware can get cloudy from mineral deposits or become permanently etched from heat and chemicals in your dishwasher. Here’s how to clean cloudy glasses if they get a milky film.