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Cleaning a mold

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Being a new mold it sounds to me like polishing residue or oils

If it's dirt or oils then dish soap is safe to use  . It works well and sunlight is the best one to use because it cuts thru the dirt and oils better than the other soaps .

Don't use the dishwasher detergents though   , they can cause a really bad reaction  with the aluminum if soaked for an extended period of time . Trust me , I've made that costly mistake 

Edited by curt k
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cascade in particular is really bad and I had a horrible experience with it .

I washed a bunch of molds in the sink , then I  filled the top rack of the dishwasher so they could drip dry . a few hours later my wife filled the bottom rack with plates and fired up the dishwasher without seeing that the top rack was loaded . All of the molds turned purplish and felt as though they went thru a rough tumbler .

Some degreaser soaps will do the same or worse . I've turned aluminum parts black while soaking in one brand .

Dawn , palmolive or sunlight are the safest to use at home

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Anything caustic will eat up aluminum.  Soaps made for dishwashers (machines) are very strong and should be avoided.  Liquid dish soap for hand-washing should be ok and hair shampoo would also be safe.  Some of the strong de-greasers are also strong caustics that should not be used on aluminum.  Remember that if you want to clean an aluminum engine or aluminum wheels!

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