One tip I learned from my Guitar Tech Friends and Luthiers: use mineral oil to maintain your guitars. You don’t need to buy the overpriced “special” scented fretboard oils. For about $2.00 you can get mineral oils from your local pharmacy, supermarket and hardware store. You want to use odorless and “food-safe” mineral oil.
For example, Target sells “Mineral Oil USP, Lubricant Laxative” for $1.99.