Boogie juice fingerboard cleaners is an all-natural cleaning product designed to, can you guess? Yes! To clean your fingerboard! It effectively removes dirt and oil from your fingers, preventing any build up on your fingerboard. Boogie Juice comes in an applicator format, that looks similar to a marker pen. You simply 'draw' on your fingerboard with the pen in the areas you need to clean. This product not only cleans and conditions, it smartens up your fingerboard too, and the pen format means you can get right up and clean against frets. It smells nicely of lemon too. That might be the lemon oil that's in there, just a wild guess!