Abstract: A hand-held device for cleaning and revitalizing wound strings of musical instruments, such as a bass guitar or piano. The device comprises a rectangular metal plate of aluminum or other similar light-weight metal and two similar cylindrical rollers of hardened and polished metal rotatably mounted on axes perpendicular to one side thereof in spaced relation to each other. The rollers have aligned annular grooves thereon normal to the axes of rotation thereof. The device is used by fitting the device to the string so that the string passes around one roller within the groove then between the rollers and around the other roller within the groove. Then while maintaining the string tensioned, the device is slightly twisted longitudinally while moving slowly back and forth along the string to spread the turns of the wound wire on the core of the string.