Sharp knives can also damage the protective coating on dishwasher racks.
Hand washing is usually the safest choice.
4. Nonstick Pans
Some nonstick cookware is labeled dishwasher-safe, but repeated exposure to heat, detergent, and contact with other dishes can shorten the life of the coating. Always follow the manufacturer’s instructions.
5. Copper Cookware
Copper can lose its attractive finish in the dishwasher. Strong detergents and high temperatures may cause discoloration or surface damage.
6. Fine Crystal
Delicate crystal can be vulnerable to chips, cracks, and surface damage from dishwasher heat and detergent.
7. Antique or Hand-Painted China
Decorative finishes, gold details, and hand-painted designs can fade or become damaged during repeated dishwasher cycles.
8. Certain Plastic Containers
Not every plastic item is designed to withstand dishwasher temperatures. If the manufacturer does not indicate that an item is dishwasher-safe, hand washing is the safer choice. Dishwasher-safe plastic is often best placed
