Apple wants you to wipe your iPhone and Apple Watch if the latest updates caused these problems
discover that the batteries powering your iPhone and Apple Watch are draining faster than usual. That is a big-time problem that you’ll want to fix right away.
The Apple Watch Series 6 was released last month
Unfortunately, fixing this will require you to unpair your watch from your iPhone and then wipe the data and settings from both devices. If you’re not sure how to get this done, just continue reading.
To unpair your Apple Watch from your iPhone, open the Watch app on your handset. Tap on the My Watch tab on the lower left of the display. Next, tap All Watches and the info button next to the watch you want to unpair. Tap on Unpair Apple Watch.
When you erase all data and content from your Apple Watch, a backup will automatically be created on the iPhone. It still is a good idea to make sure that you have enough cloud storage for the data. So on the iPhone, tap on Settings, your name, and iCloud. Make sure that the Health app setting is turned on, or turn it on now. Do the same thing with the iCloud backup setting and tap on Back Up Now. To confirm that you’ve just created a backup, tap your profile picture in the Health app. You should see the time of your latest back up on the bottom of the screen. Make sure it shows a recent time. If no time appears, wait for the last backup attempt to finish and try again.