Apple Watch won't re-pair
A couple great months after having my Apple Watch, I noticed that my Apple Watch suddenly was only connecting to iCloud (it had the green cloud symbol), not my iPhone 5. Turning Bluetooth on and off didn't work so I decided to unpair then re-pair my Apple Watch. So I went into my Apple Watch then cleared off all the data and reset it. Then the Apple Watch reset and gave me the option to visually pair with my Apple Watch app. When I attempted to do that, a notification would pop up and say, "Pairing Failed: your Apple Watch couldn't pair with your iPhone" and it gave me the option to try again. Which I did, and came up with the same result every time. (P.S. both my iPhone and Apple Watch are up to date in terms of software updates).
Apple Watch Sport 42mm, iOS 9.2.1