The strings on my electric guitar, (ghs boomers), are rusting pretty bad. They don't last near as longs as they should. My room isnt that damp although i do live down in the basement. My guitar instructor said i might be the kind of person that has oily fingers (gross) :o and that corrodes the strings. Is there any type of string that is more durable and what can I do to keep them from rusting that ? It is only on the top three strings by the way.