On my fairly new squier deluxe 5 string j bass I've noticed on the 5th fret of the G string it has very little sustain. All the other strings and frets are fine, even any other string on the 5th fret, it's just that one spot that has little sustain. The strings on it are the factory ones, and seem to hold a tune well. Should I replace them? Is it the fret itself?