This Handy Kitchen Mainstay Should Never Be Put In The Dishwasher. Here's Why.

We love to keep and reuse aluminum pans to save money and be more eco-friendly, but proper cleaning is key to their longevity. For one, if you're tempted to give them a quick spin in the dishwasher, don't. There is quite a long list of common kitchen items you should never put in the dishwasher, and products made of aluminum are at the top. That's because the prolonged washing cycle will inevitably lead to varying degrees of oxidation. As Vera Peterson, the president of Molly Maid, told Martha Stewart, "You should not put aluminum in the dishwasher as the detergent, high heat, and minerals in your water can trigger a reaction that darkens the metal."

This rule applies to disposable aluminum pans as well as all pots, pans, or baking sheets made of non-anodized aluminum. Even if the item in question has a label or sticker that assures it's safe for the dishwasher, it's still best to stick with hand washing. Otherwise, your kitchen gear is at risk of losing its sheen, becoming dull, and turning dark. While one dishwasher cycle may not cause major discoloration, repeated washes will continue to damage the pans. There are many better ways to clean and store your aluminum pans instead.

While aluminum is a common material for kitchenware, it is quite finicky when it comes to cleaning. Even leaving aluminum pans to soak too long can lead to oxidation. Instead, strive to clean them immediately after use, so there's minimal time for residue to really stick. Gently scrub the pans with a soft sponge or cloth and warm, soapy water to remove food without scratching the surface. To lift pesky residue and grease, you can allow the pans to soak in warm water with a dash of soap for no more than an hour. And while it may be tempting to use baking soda, it's one cleaning ingredient you should never use on aluminum, as it can lead to damage and discoloration.

For any pots or pans that are already tarnished, the spots can be removed with a DIY paste made from cream of tartar and warm water or Bar Keepers Friend mixed with water. Cover the stains with the paste and let it sit for about 10 minutes, then rub it off using a rag. Once all of the grime and grease is gone, rinse thoroughly and dry completely, making sure to remove all moisture with a cloth. Finally, store aluminum pans away from heat and direct sunlight to prevent warping, placing parchment paper between them to prevent scratches.