Old showerhead always came out with little pressure and unevenly. Cleaning didn’t help much so I looked for a new one. I found a seller that manufactured locally and specialized in showerheads. Much better than the attractive plastic junk from the box stores.
It was an easy change and it makes a big difference.
Nor with my well water they don’t.
Put your shower head in a ziplock bag filled with vinegar and leave overnight. If you don’t want to take it off first, use rubber bands to hold the ziplock in place.