I've had my Strat for over ten years now and for the last year or so I 've noticed that my low E is starting to buzz more and more and it seems to have lost alot of sustain and just sounds weak. If I tweak the truss it makes it better but raises the action a little more than I want up the board. I assume after a gazillion string changes the slot could just be worn down some. This is the first time I've had a guitar this long and played this much so I havent run across this. Is it time for a new nut, is that typical after lots of use?