Charge 5 screen wake stopped working

[TerryH.]

For the first 2+ years I've had my Charge 5 I was able to activate the display with a sharp twist of my wrist.  Last month, this function stopped working and I can no longer activate the display by twisting my wrist.  I am able to activate the display by double tapping the screen ... but this is beyond annoying and it is creating wear marks on the face.

Is there an option to turn this function on/off which may have gotten turned off inadvertently?  OR  Is there something mechanically wrong with my Charge5?

Moderator Edit: Clarified subject

[TerryH. · Accepted solution]

I solved my own problem.  After reading a couple of other questions, I went in and found that the Screen Wake function was set to Manual.  I tapped it to change this function to Auto and all is well.