This is an easy one … but I forgot enough times that I needed to add it here.
- Turn off your Nexus device
- Press and hold the Volume Down and Power keys at the same time for about 7 seconds
- An image of an Android lying on its back will appear
- Press the Volume Down key twice – you’ll see “Recovery mode” appears on the screen
- Press the Power key to restart in “Recovery mode”
- An image of an Android and a red triangle will appear
- Press the Power key and Volume Up keys simultaneously (it may take a few tries)
- Use the Volume keys to scroll to “wipe data cache partition” and press the Power key