I've had my AW3 for about 3 months now. Up until about a week ago, I would routinely get 2-3 days battery life. I added the Heart Study app, which may have just been coincidental, and then my battery drained at an average of 10% per hour! I rebooted both the watch and iPX. No change. Thinking it was the app, deleted it a few days ago. No change. What used to be one of my favorite things about the watch (battery life) is now a royal PIA. Suggestions?