Can anyone help me get to the bottom of my shower problem please? Our en suite shower drips constantly and the drip speeds up if a toilet is flushed or the taps are run. Lately it has started squealing (when off) this seems to be when the drip has turned to a constant trickle. I wondered if the water pressure might be too high or if I need to replace the control bar? I'm hoping it's something I can fix myself rather than call someone out for it. Thanks in advance 