Hi There Javaliga,
I've got some good information for you. Remember, I'm the one with the Apple Watch and we couldn't find the slider to turn off the Apple Watch? I called Apple Care today. The rep, Garrett, was very helpful, and we both learned something that he wasn't aware of either. This recent update to the Apple Watch OS moved the Turn Off slider to that little logo in the upper right. So when you hold down the button, you see the most urgent choices first and you need to go up to the right logo to then see the Turn Off option. I thought you might want to know (I used to be in software support with Unisys). Thanks for your help.