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.