Unscrew the button or screw that retains the handle in place, take away the tackle, then unscrew or remove cover plate. This exposes the physique and spindle. If there is water in the highest of spindle as well as outer entire body is damp, it’s a sign the O-ring is leaking.  https://marcovbiot.myparisblog.com/35322687/the-ultimate-guide-to-emergency-plumbing-call-out