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 on the top rack.
9. Insulated Travel Mugs
Unless specifically labeled dishwasher-safe, insulated mugs and containers can be damaged by water entering the space between their layers or by repeated exposure to heat.
10. Wooden-Handled Knives
Even if the blade itself seems durable, the wooden handle can warp, crack, or deteriorate during a dishwasher cycle.
11. Brass Items
Brass can lose its finish and become discolored when exposed to dishwasher detergent and high temperatures.
12. Bronze Items
Like brass and copper, bronze can experience discoloration or surface changes in the dishwasher.
13. Pewter
Pewter is another material that can react poorly to dishwasher temperatures and detergents, potentially causing discoloration or pitting.
14. Silver Items
Silver requires special care. In particular, silver should not be washed in the same basket as stainless steel because contact between the metals can cause permanent damage.
