On the third night, check the door lights more often than on the first two nights. Chika and Bonnie became more aggressive. Foxes also peeked into the bay much faster than the second night, so watch out. Freddie also became active on the night, but only a little. If you don't watch him closely, he'll attack. Use the same method on the second night, except occasionally look at the stage as well.

If Freddy gets closer (i.e., east Hall or East Corner), you may want to close your right door while you check the camera. Freddie's most likely moving when the cameras are up.