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Aluminum pots,pans turn dark in new dishwasher. Why?

I have a new Sears dishwasher. It has a metal lined interior as opposed to our old Sears with a different interior,(I only know it was not a metal interior). My MIL also had this problem with a Maytag dishwasher.
I use the same soap as before with the old dishwasher. Now all of my aluminum pots,pans and bakeware,cheap and expensive turn dark and ugly when washed in the new Sears dishwasher. I honestly wonder if it is because of the new metal type interrior of the dishwasher and has nothing to do with the phosphates changes made in the soap industry. I never had a problem with the aluminum turning dark before we bought the new dishwasher. Everything else is the same. Are the Aluminum products safe to use now that they are dark? Do I need to toss them out and never use Aluminum again? How do I make them look good again?

Dishwashers , Maytag , Appliances
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2 Answers from these members:
afritz afritz
Putting lots of details is really going to help and expert diagnose your dishwasher a whole lot better. If you still do not come up with a solution you can always go onto the Sears Home Services website and schedule for a technician to go to your home and repair the problem. I have attached the link below. I hope this helps!
by afritz afritz Earned 36,383 community points in Appliances
October 10th, 2010
Answered in 45 minutes
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Lyle W
I normally don't recommend that you wash any aluminum items in the dishwasher. Refer to the washing instructions of aluminum items when they are purchased. Some are listed as dishwasher safe but may still darken when washed in the dishwasher.

The new dishwasher with a metal tub will likely heat the water and keep it hotter than your previous model. The combination of the high heat and the detergent will darken aluminum cookware in some situations. The darkened cookware can be cleaned using mild dish washing detergent. The dark areas should not affect the performance of stove top pots and pans. The dark spots will not affect the safety of using the aluminum cookware. Dark spots on bakeware can sometimes cause burning of the bottom of dishes (cookies and cakes) when they are used in the oven.

The cookware can sometimes be cleaned by boiling equal parts of white vinegar and water in the pots. You can use a similar method for cleaning bakeware. Soak the bakeware in a hot solution of white vinegar and water for about 20 minutes. Wash the cookware and bakeware with mild detergent and rinse thoroughly with water. In some situations, you can use a mild kitchen abrasive such as Bar Keepers Friend or Bon Ami to clean the dark spots off of cookware and bakeware. This will sometimes remove non-stick anodized coatings on some items.

If you can clean the items using the above tips, then you should be able to continue to use them. If you have doubts about there usability, then I recommend replacing them.

Going forward, I don't recommend that you continue to wash aluminum items in the dishwasher.

If you need more help, reply with additional details and we will try to assist you further.
by Lyle W Earned 105,895 community points in Appliances
October 11th, 2010
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