We're having the same problem here. This is very frustrating...
My wife and I both got the Sense for Christmas. We both have the iPhone 8.
We've been using the Sense mostly without issue. (Twice in the last month or so my wife's would not sync and I had to remove the Sense from the FitBit app and re-add it.)
Anyway, 2 days ago my wife's Sense's battery started draining in less than a few hours -- not a day, a few hours. She has literally *not* changed anything. We don't have the GPS on, etc.
She had been using a clock face that wasn't one of the pre-installed ones. She has been using that clock face for months without issue.
I had her try restarting the watch, but that didn't fix anything.
Our apps are all up to date.
As a test, I had just go back to the default clock face and she's now charging the phone again. I suspect though that this won't fix anything (because as I was saying she's been using that clock face from the beginning).
Anything else to try?
We ordered the Sense directly from FitBit so hopefully a return won't be a problem.
On a related note, my Sense stopped receiving text messages a couple of weeks ago and I can't get it working again. I tried the tips I've seen suggested in these forums: swiping right and turning notifications off and on, etc. But nothing. I can see when I get a calendar notification or a phone call. But no text messages. Actually, now that I think about it, it doesn't get some other app notifications as well. Hmm...
Help?
