GHS Fast fret is a long standing favourite of musicians and guitar techs alike. Simply rub the applicator up and down the fret board over the strings to clean the strings and fretboard. Apply it to the back of the neck and it also doubles up as a lubricant to enhance playing speed across the neck. Its good for wood, brightens your sound, prolongs fingerboard life and wont damage your frets. .embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; }.embed-container iframe,.embed-container object,.embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }