All the instructions are correct but I suspect that if it's regularly coming loose then the culprit will be the expansion bung pulling out of the steerer in my experience this is a common scenario so any adjustment is only good until the bung moves a little more it's a little more involved to fix this if your not used to working on headsets but in the scheme of things it's still dead easy and there are plenty if online videos etc..with carbon steerers a torque wrench is important failing that take it to your lbs