I've never been able to make much of a dent in squeaks, except in Adobe Audition, which has a tool for identifying and elimination single noises like that. I recorded some guitarists last summer in Central Texas, which is fairly dry. This was being done in a living room, not any kind of climate-controlled studio. Anyway, one day the humidity changed, and every time anyone changed position on the fingerboard we got these loud skweeeeeeeeeeeeks. We tried washing hands, lotion, Fingerease spray, and several I don't remember. Nothing worked, except that after I got the recordings home I used the AA tool to clean them up.