Hi all, As some of you may have noticed, I'm in the process of changing a few things on my 4x10 cab. 1. Going to replace the stock black grill cloth with Marshall large check. 2. Going to replace the stock plastic handles with the same size Scumback metal ones. 3. Going to replace the stock internal speaker wires with red and black twisted, and solder the wires to the terminals instead of using the stock spade connectors. Question: Do you have any recommendations for cleaning the speaker tab terminals, prior to soldering? I imagine the 30 plus years terminals have some oxidation on them. - Should I just use some contact cleaner on a q-tip perhaps? Thanks a lot.