I just bought my EB MM SR5 in October, and the fretboard on this thing is already so gross it pains me to look at it. Now, I was my hands obsessively when playing, and I clean the board with Formby's Lemon oil and a damp washcloth every time I change my strings or about once a month, and the board is all discolored and grey, even a gross greenish color in some spots. It's really upsetting. There are a few threads here about cleaning these things, but they all recommend measures I've already tried. The Ernie Ball forums recommend diluted Murphy's oil soap for heavily soiled boards, but that only sanding will removed ground in dirt, and it's not recommended. Anyone have any experience in bringing one of these boards back to showroom shine, and what to do to protect it in the meantime?