The String Cleaner -Guitar Banjo Mandolin Ukulele - 094922104465
Grofry Guitar String Cleaner Cambered Handle Care Cleaner Washable Guitar String Maintenance Cleaner for Basses A - Walmart.com
Tone Gear Guitar String Cleaner | Sweetwater
Amazon.com: 2 Pack Guitar String Cleaner, Used for Cleaning String and Fretboard, Guitar Fretboard Cleaning Maintenance Care Kit for Guitar/Bass/Mandolin/Ukulele : Musical Instruments