Stand-mixer beaters: check the material before using a dishwasher
Uncoated aluminum beaters generally need prompt hand-washing and drying; coated parts and whisks vary by model.
Stand-mixer accessories can look alike but have different coatings and cleaning requirements. KitchenAid says burnished, uncoated aluminum beaters can oxidize and leave gray residue after dishwasher cycles; some coated beaters are dishwasher-safe. Check your exact part and mixer model rather than assuming every accessory can go in together.