react with the alkaline environment created by some dishwasher detergents. Repeated exposure may cause discoloration, corrosion, or pitting.
Even when an aluminum item is technically labeled dishwasher-safe, checking the manufacturer’s instructions is worthwhile, particularly for cookware with special finishes.
Copper Cookware and Mugs
Copper is beautiful. That warm glow is hard to beat.
But dishwasher detergent and high heat can dull copper and damage its finish. Over time, the appearance may change substantially.
That Moscow Mule mug deserves a gentle hand wash if you want to preserve its finish.
Pressure Cooker Lids
Here’s where things get a bit more serious.
Pressure cooker lids can contain valves, seals, and other components that are important to the appliance’s safe operation. Depending on the model, some parts may be dishwasher-safe while others should be washed by hand.
Food particles or detergent residue can interfere with components if they are not cleaned properly.
Rather
