One thing that I noticed after the update a few days ago, is that they installed a "Hand Washing" watchface and capibility. That's when I noticed a massive battery drain on my watch, so after seeing what it would do, I removed the watch face. I was still seeing the battery drain, seeing the automagic recognition of the hand washing, I got to looking around, and discovered that it also installed a "Hand Washing" app. This listens constantly by keeping the microphone open, listening for the water running. I removed the app, (actually uninstalled it), and now the battery is back to normal. You might try this.