I am pulling my hair out over this. i have a 3 handled shower and the hot water faucet handle broke, it is plastic. i removed the cap revealing a screw, ok here is the hard part. THE SCREW WILL NOT COME OUT!! I have tried turning it with a screwdriver but it will not budge. This is a older shower faucet but not ancient. Does anyone know why the screw wont come out. To take a shower we have to use a screw driver to turn the hot water off or on. The screw will turn and that is what turns on the water but how to I change the plastic handle since the screw will not come out?