I again experienced my 3rd string sticking when I tried to tune it on my OM-03.  So I decided to put some graphite on the nut.  I loosened the G string and went down to the basement to get the lube.  Came back up with the liquid graphite instead of the powder graphite.  Didn't realize until my mistake until it poured out all over the nut, head, and fingerboard.  What a dip-stick I am!  I got it cleaned up pretty good except for the seam between the nut and the ivoroid, there I have a black line between the two pieces of white.  I can replace the nut but I wonder if I have stained the ivoroid.  :huh: