Hi All,
I checked off this one on my maintenance list.
Like many of us (maybe all of us), our shower head has this chrome button to turn the water on and off at the head. Ours got harder to work with each passing year. This past trip was unacceptable so it was time to take action. Actually I waited far too long to take action. I should have done this four years ago.
Here it is taken apart. To disassemble it, grab the ends of the chrome stem and unscrew it from itself. One end comes off as a fancy slot-less screw. Afterward I had trouble removing the stem from the handle for there was so much resistance. I ended up screwing in a much longer screw, then applied pressure on that screw to push the stem through. As it turned out the stem was so hard to remove because one of the "O" rings kept getting hung up on a plastic hole inside the handle. Once removed, I learned I damaged that "O" ring which left a tiny rubber chunk inside. I removed that debris, cleaned up everything, lubricated everything with a thin layer of Vasoline, replaced the damaged "O" ring, reassembled, and now the button works as smooth as butter.