Although some products are dishwasher safe, repeated use in the dishwasher may cause the non-stick coating to wear out more quickly.
6. Copper utensils
Dishwashing detergents used in the dishwasher can discolor copper and reduce its shine.
7. Fine china
Fragile porcelain with decorative surfaces can be damaged, discolored, or cracked in the dishwasher.
8. Crystal glasses
High temperatures and strong water pressure can cause the crystal to cloud or even crack.
Unless the manufacturer specifically states that they are dishwasher safe, washing them in the dishwasher may damage the vacuum seal.
