The GrEttin Switch allows you to control the operation of the Grendel and Ettin egg layers. It does not stop any existing eggs from hatching, and does not remove existing Grendels and Ettins. Once you have injected the switch, you will see a tiny button at the bottom left of the screen. Image:Greswitch.jpg Click on it to expand the switch, then click on the round button in the top right corner to minimize. Select Grendel or Ettin control by clicking on their outline, another click deselects the creature.