In the future, I'd lean toward Caig for home audio. The CRC stuff I've tried seems more for industrial applications. Keep a cloth around the part to keep it from getting on other parts. Even an aluminum case front might have a plastic clear-coat to keep it looking new.
Electronics cleaner
I have a toggle switch that just crapped out on me in my Audio Research SP11 pre amp. It's the "normal/ bypass" switch. It works on normal but sounds faint and fuzzy on bypass (which is where I like to keep it set). Should I try to clean it before I send it in to AR. Any suggestions which cleaner might work. I have a can of Caig DeoxIt and a can of CRC cleaner here. Is one better than the other, or could there be something else going on? I know I can call AR but I think I know what there answer might be.