I dont know why this is a big secret or so hard to find.
Use at your own risk, but it was easy to reset.
Reset Admin Password:
Hold the Home (house) button down on the printer for 6-8 seconds, then let go.
Then enter the default passcode: '6789'
A menu with full access will come up.
Go down to "Resets"
Tap on "Reset to Factory Defaults"
Custom settings and passwords will be reset.
Thanks. This is a quick and easy way to reset the printer to factory settings and clear a forgotten Admin password.