8 Things You Should Never Put in the Dishwasher (And Why)

sponge. Dry it promptly with a clean cloth to help prevent water spots.

For tarnish on uncoated copper, use a cleaner specifically approved for copper or follow the manufacturer’s care instructions. Avoid using homemade acidic cleaners unless the manufacturer confirms they are suitable for the item’s finish.

. Insulated Travel Mugs and Vacuum Bottles

Reusable travel mugs and vacuum-insulated bottles may look dishwasher-safe, but many models contain seals, adhesives, coatings, or vacuum layers that can be damaged by heat.

Some lids are dishwasher-safe even when the bottle itself is not. Repeated dishwasher cycles may also cause painted designs and decorative coatings