Well, I mentioned the grease as a means without considering it's suitability for cameras. As a watchmaker, I file and stone the screwdrivers to properly fit whatever screw they're used on, if needs be. The screws are cleaned with the rest of the watch parts, the screwholes are cleaned by screwing a peg in and out, the slots are pegged clean and the screw is then replaced by placing it with a tweezers in it's hole and tightening. Wherever possible i put the slightest hint of oil on the threads, there are places in a watch where you can't do this.
Originally Posted by Tom1956
I handle all small screws with tweezers, whether it's going in a watch, a camera, or whatever. Saves fumbling. I can write a short treatise on tweezers, their design and construction, if you like... I make my own sometimes because you can no longer find some of the special types watchmakers once used.