My strip oak floors (laid on wood sleepers on concrete base) have squeaked ever since we moved in in certain locations - like right next to my sleeping wife as I go in and out of our BR Saturday morning.

I have squeaked plenty of graphite on the joints on either side (some tight, some open 1/16th ") but can't really notice a different.  There is observable movement in the strip oak, so it's probably not the subfloor.  Has anyone here ever used the graphite method?  Am I just not using enough?

Christopher    PS Or maybe I should use wax.