ok i belive this belongs here if not move it. the last time i used my 6 string was about 5 mounths ago and it was tuned down half a step. today i picked it and went to play it and im getting noise (where the string when played open is reverberating of the first fret) how do i fix this. it didn't do this before and i was hopeing to sell it soon. but not if it sounds like rubbish. do i need to re-string (these are practicly unplayed strings) or is this an issue with the nut. if it is what would you recomend i do about it??????