Fitbit Charge 3
- Make sure the Fitbit Charge 3 is plugged in.
- Press and hold the button on the side of the fitbit for 8 seconds, a smiley face will appear on screen.
- Swipe left three times on the screen to get to the Settings app.
- Scroll all the way to the bottom and click "About".
- Select Clear User Data in the about menu.