D'Andrea USA's String Cleaner & Lubricant prolongs string life and renews string tone by removing the oxidation and natural build up from hours of playing. Simply apply to a polish cloth and gently rub the strings up and down to bring your strings back to life while lubricating them for playing ease. Do not apply to any other surfaces other than your strings. Keep your instruments in tip-top shape with our professional line of Guitar Care Products. Proudly Made in USA!