My roommate has an issue that maybe some one can help with, his sweat causes his strings or anything that is metal to oxidize very very fast. I didnt pay much attention to it until he played my les paul for just a couple of minutes one day and the next day all the strings were rusty and corroded, like someone had left the guitar out in the garage for 2 months, He just bought a new guitar and doesnt play it much cuz strings only last him a couple of days or so if he plays every day. All his allen wrenches and guitar tools are rusted too and they are only 1 month old. It is not the climate because I live here too and have had nothing affected. Any creams or sprays or treatment that would be of use would be greatly appreciated.