Hmmm, first I have heard of this. If it is true I wonder to what degree it weakens the aluminum. Just about everybody I know of in the real world and on-line uses simple green to clean their bikes. This includes many professional wrenches.
I don't doubt what you are saying. I'm just thinking that a very, very minute amount of weakening would be a much bigger deal in the middle of space compared to on our bikes.
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