I have a 5-stringed Oscar Schmidt Washburn bass. The E-String Rattles like crazy, but only at the First Fret (or at least, if I hold down the 1st Fret the rattling stops). I've tried raising the string (I raised it higher then the B string) and it seems to have gotten a little bit worse... I'm not really sure where to turn to after this. I could bring it into the shop, but I'd rather learn to fix problems like this myself. Any ideas would be most appreciated. Thanks!