The Sneaky Troublemakers
Aluminum Pots and Pans
Ever seen aluminum come out of the dishwasher looking dull and blotchy?
That can happen because aluminum can 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 than guessing, follow the manufacturer’s cleaning instructions for the specific pressure cooker.
Nonstick Pans
Yes, many nonstick pans are labeled dishwasher safe. And technically, they generally will not melt during a normal dishwasher cycle.
But repeated exposure to high heat, detergent and aggressive water jets can contribute to wear of some nonstick coatings and finishes.
If you want your pan to last as long as possible, hand washing is often the gentler option. Always follow the manufacturer’s instructions for your particular pan.
Cookware isn’t the only concern—some dishes and coated surfaces can also lose the very qualities that make them attractive or useful after enough dishwasher cycles.
The next group may look dishwasher-friendly at first glance, but their coatings and finishes can be more delicate than they appear.
