hey there! erm ive got a weird problem with my bass atm, basically if i turn the tone up on my bass (a precision) i get a really irritating hum, almost as if you have the gain turned up real high. but the strange thing is that when you touch any bit of metal on the bass like the knobs or bridge, the humming stops! has anyone got any bright ideas whats causing this? and how to fix it? thanks very much!