The Apple Watch may be a much simpler device than your iPhone, but that doesn't mean it's free of bugs, glitches, and crashes just like your other devices. A common problem that you'll run into is a frozen screen due to a malfunctioning app. While this can be frustrating, the solution can be as simple as a quick reboot. Restarting Your Apple WatchFor the less serious issues, a quick reboot should do the trick. Power down the device by pressing and holding the side button — not the digital c...