If you really want to make that fret-board pop, try using some walnut oil instead of lemon. Rub it into the fret-board, let it sit a few hours and wipe off the excess. Does a great job of conditioning a dry board and darkens it nicely.
Great. I'd like to give that a try. Where do I get this oil? also do I need to watch out for the wrong kind? I know with the lemon oil you can't use the detergent kind.
I highly recommend NOT doing this. Too much of any oil causes frets to pop out of the fret board.
Any oils should be used in very small portions and NOT left on the finger board for extended amounts of time.
For cleaning fret boards a mild cleaner should be used. Like Murphy's oil soap. Quickly dry. Then apply a small amount of (lem) oil to a rag. Apply (wipe) it over the fret board evenly. It should only take 2-3 applications to be sufficient. The lem/whatever oil should not sit on the fingerboard. It should only take a few minutes to apply any fret board conditioner. This should be done about every 6 months. A bottle of lem oil should last the average person YEARS. If they are using it correctly.
I am a Luthier/Guitar Tech with 31 year of experience.