This is what I started with: Years of heavy playing were turning my nice maple fingerboard into a gross used-skin emporium. I didn't want to use anything too harsh, but needed more than just a damp cotton cloth. Looking around for cleaning supplies, I came across a container of Lysol disinfecting wipes. I thought I would give them a try. I got one out and squeezed out as much of the excess liquid as I could (these things are really wet). After removing the strings on my bass I gently rubbed the fingerboard with the lysol wipe, and within about 3 seconds all of my finger gunk was gone between the nut and the first fret! I continued down the length of the fingerboard (using 3 more wipes in the process) and here is the end result: My bass is 15 years old this month, and it looks almost new again! Although I happen to like "mojo" on basses, mine was getting just a bit too yucky. If only my trombone would clean up as well!