Ackworth Guitar Setups Lemon Oil is specially formulated to support your dark wood fretboard to maintain hydration and reduce the likelihood of cracking. 
 
Apply a thin coating and rub in with a microfibre cloth, and ensure your guitar has a properly hydrated fretboard!
 
This product should be used in conjuntion with the Ackworth Guitar Setups Fretboard Cleaner.
 
(size 50ml)