My Picoo won't turn off anymore. What can I do?

You can try resetting the controller. You do this by holding down the button for 10 seconds until the light turns yellow. Make sure you hold the button firmly until you are sure it is resetting. Once the yellow light appears, you can release the button. 

If the Picoo controller does not respond to button presses, you can leave it for a while. The controller will try to reset itself after a while.