The plumber identified mineral buildup in the shower valve as the cause.
He pinpointed a worn-out pressure relief valve that needed replacement.
He taught me a quick way to clean the shower head to prevent future problems.
I have been using it now for 3 months and it saves me so much research. Reduces the need to call and double check every time.
How did I not know these places existed?! Atly's scoring is a lifesaver, now I can finally find THE spot without wasting time Googling my life away.