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. · Easily clean your finger-board with the Fret Butter all-in-one cloth · Prevent cracking and splitting of your finger-board · Bring back like-new luster to your frets Fret Butter contains no harmful chemicals, is prop65 compliant, cruelty free, vegan, and air-travel safe worldwide. Fret Butter only contains food grade products and is free of lemon oil.