To reset most nüvi devices:
1.) With the device switched off, place your finger on the lower right corner of the screen.
2.) Switch the device on (hold the power button down until you see the Garmin logo), while still keeping your finger on the lower right corner of the screen.
3.) Keep your finger held down until the question "Do you want to erase all user data?" appears on the screen. Answer "Yes".
WARNING! This procedure erases all user data (waypoints, track log) and resets the device.
4.) The device will restart and you will need to enter your settings again.
