Support mural 9 réglages ActivTouch HS 2,5 GPM 55424-CZ

I bought two of these shower heads and they are excellent EXCEPT that twice now the back selection buttons have become stuck after a few weeks of use. The first time I exchanged the unit where I purchased it. Now it's happened to the second unit and I read that it has happened to others. I fear that there will be no end to this. Is there a way to get the buttons unstuck?

I bought this about 6 months ago. It was working great but then the ActivTouch button on the top stopped working. The spray remains the same. The button that pauses the flow works fine. I tried soaking the shower head in white vinegar to remove any calcium deposits as we are on a well but have a water softener. Any ideas to fix it? My last shower head lasted 15 years. Not happy.

Hose nut is made of look alike chrome with cheap plastic. I did not understand the purpose of saving a few cents by making the hose nut with cheap plastic. My hose nut broke after a couple of months. Once broken the whole thing is a piece of garbage.

At first I loved this product. However, a little over 1 year it has now stopped working. I unscrewed the sprayer from the hose, and water still came out from the hose. However, I cannot get water to come out of the sprayer.