Chosen Solution

The ‘back’ and on button depresses still but doesn’t actually do anything. Can anyone help?

I just got my button to work. I soaked the watch in distilled water and then used the bristles of a soft toothbrush to poke into the teeny opening around the sides of the button. My guess is that dead skin and soap and dust get in there to gum it up. It took a few times, but it worked! Good luck!