Good day, All! Wondering if any of you helpful folks might have an idea of how to restore a maple fretboard. I bought a well-used Tobias 5-string last week and its fretboard is badly discolored - not sure if from age, wear, lack of regular cleaning, or a combination thereof. It sounds fine, but looks terrible and feels kind of "sticky". The frets are fine, though. Short of replacing the neck, any great ideas or personal experiences? Thanks for your help, as always.