One of the bridge height adjustment screws keeps coming loose on my Precision Bass (leftmost screw in the picture). The screw doesn’t feel loose when the height is properly adjusted, but the E saddle works its way down to the deck on that side after just a few hours of play. The first time I noticed the problem, the screw had almost worked its way entirely out of the saddle.
My playing style doesn’t bring my hand in contact with the bridge much, so I presume that vibrations are working the screw loose. This of course affects the action and tuning of my E string, and I’m concerned that it might fall out completely. Is there something I can do to fix this? Do I need a new screw or some kind of (anti) lubricant?