|Note: This will erase all your data.|
To perform a factory reset:
Power the unit off.
Then hold the power button until it gives you the short vibration
Right when it does, hit the VOLUME UP button a couple of times. (This may take a couple of tries.)
This will bring up a menu that includes a full factory reset.
Use the volume buttons to move the menu selection and the power button as the "enter" key.