I've kept the humidity at 45 all through incubation, but my air cells don't look very big. I can't see inside the brown eggs to see what is going on either. It all appears to be full of chicken with an air cell at the top. I could see them moving earlier. Hopefully they will hatch this week. the air cells are slanted like they should be, but just aren't too big....I was looking at my duck egg that is about to hatch and the air cell is gigantic. Oh well - they will hatch or not, not much I can do about it at this point. It is pretty much a done deal. Send some good hatching vibes this way.