Check the listing for details. Fret Butter Fingerboard Cleaner (Single Packet). Condition: New. Listed at 9.99 USD. FRET BUTTER™ IS A UNIQUE AND SIMPLE PATENTED PROPRIETARY SOLUTION FOR YOUR STRINGED INSTRUMENTS' FINGERBOARD. Fret Butter™ hydrates the wood and removes grime and oxidation from your frets in one simple application. The result is a clean hydrated fingerboard with shiny frets and a satin smooth finish protecting against sweat, acids, metal corrosion, and string abrasion. NOW YOU CAN:Easily clean your finger-board with the Fret Butter™ all-in-one clothPrevent cracking and splitting of your finger-boardBring back like-new luster to your fretsFret Butter™ contains no harmful chemicals, is prop65 compliant, cruelty free and vegan. It is air-travel safe world-wide and ships to 169 countries. Fret Butter™ only contains food grade products and is free of lemon oil. FRET BUTTER™ IS:Competitively pricedSuperior and more effective than other productsUsed by world class LuthiersYour Guitar Maintenance Solution™The Fret Butter™ re-sealable zippered package has equal dimensions as a pack of guitar strings with included hang-tag. The one-piece applicator cloth can be used multiple times.