Boogie Juice is an all natural cleaning product designed specifically for the care and maintenance of instrument fingerboards. With its patented dispensing system, Boogie Juice can effectively remove dirt and oily build up from your guitar's fingerboard, and maintaining the condition of your fingerboard will help the instrument to retain its tone and help prevent adverse effects. With regular application (usually between string changes), your fingerboard will stay conditioned and free of grimy build up. It will also help reduce cracking in the fingerboard due to humidity changes. The Boogie Juice Application Pen features a Tip Operated Valve for direct application and getting into tight spots and close up to frets on any Guitar, Bass, Mandolin, Ukulele, Banjo, or Violin.