Hi, I am new to guitaring altogether, so right now I can't do much. I bought a squire strat from a friend, who bought it, and gave up shortly after. It's been sitting in his basement for a few years, and it's in good condition, save a few, fairly un noticeable dents in it. The only complaint is that once in a while when it is on one of two channles, can't remember which ones, it will make a very, very loud buzzing noise that get's progressively louder unless I touch the strings. How can I solve this?