I just took off my tub faucet and handles to work on the wall. When I reattached the handles, the COLD handle won't stay tight. I have to re-tighten the screw when I turn the water off. What do I need to do wo it works right? Confused:ds

Perhaps you started the screw in cross threaded so it won't tighten the knob. Unscrew it and try again. Tom

U could also use 'loctite' on threads.

Use it on my rifle sight mounting screws

Chuck