I'm not sure what you mean by fretboard conditioner. If you used Finger ease, then you mean something that makes the whole thing slippery. If you mean something to clean the wood and keep it from drying out, just get some lemon oil and some 0000 steel wool. I've cleaned hundreds of guitar necks with that combo. First, remove the strings. You just put a bead of the oil down the fingerboard and work it in with the wool until all the gunk is gone. Wipe off the excess with a clean cloth, wait ten minues and wipe again. By the way--this works for rosewood and ebony boards--not lacquered maple necks. Don't know if I have answered your question, but this is good stuff to know for any guitarist.