On my Jazz Bass neck, the fourth fret seems to be a little higher than the others, so I checked it out and there's a little gap between the bottom of the fret and the top of the fingerboard. Is there any way I can compress this and fix the problem without taking the bass to a shop? It is really important to me since it makes all the frets below the fourth buzz like crazy, and playing the music I like just sounds terrible. I appreciate any help you guys can give me. Thanks!