The Old Master Bow Hair Cleaner and Conditioner is a non-toxic cleaner that was specifically designed not to interfere with the bows sound and performance. It contains moisturizers and conditions keeping your bow hair supple. Unlike using rubbing alcohol, this product will not damage the bow hair; even with repeated use. Old Master Bow Hair Cleaner and Conditioner is also used when your bow is not responding properly because of rosin build up. And is perfect for seasonal rosin changes. Reduce wear on the bow, increase its’ longevity and reduce the need for frequent bow re-hairing by using the Old Master Bow Hair Cleaner.