Planet Waves knows that dirty strings equal grimy tone. That's why they made the Renew string cleaner - to save your tone and keep your strings clean! The Renew string cleaner cleans the top and bottom of your strings at the same time, not just the top like some cleaners. Your strings will last longer and your tone will too! Keep the Planet Waves Renew string cleaner in your case, and say goodbye to grubby strings.