Rickenbacker bridge screw problem

Subject:

Comments:
: I have a problem when playing my Rick 360 model. I always have my hand on the bridge when playing specially for muting the strings. the screws always losen up (to the point than one or 2 of them almost unscrew come completely off!!!). I always notice it in the middle of a song when they're scraping against my right hand. : Is there any way arround this problem? should I tape the screws? I need help, I haven't been playing my rick because of this... help