WD-40 for the strings and top side of the neck-spray inot rag then wipe. This is more as a lube though. I change strings on my primary chopper about every 1-2 weeks and always right before a gig.

Try this trick: Go to a billiard supply store and get a good rosin bag (not just baby powder but that will work) and some 800 grit sand paper. Lightly clean the back of the neck with the sandpaper and then rubdown with the rosin bag. Do not use on fretboard or strings - makes them squeak. Then wipe down the top with WD-40 or your fast fret stuff. You will love the feel!!!!!