Help!!! We've got a rotten egg smell just like you did!! It's not strong, doesn't smell cheesy, no clear sticky substance. All the eggs have moved now ECXEPT for one in the back corner (#14). But it's way in the back so we can't really see it. It was are STAR STUDENT too!! What do we do?!?! Help!! Could it just be an old incubator and down bacteria on the outside of the eggs?