I've been reading all the articles on incubating eggs. Today marks DAY 18! It said, "lay the eggs on their sides and position the lowest part of the air cell at the top of the egg." Can someone give me an example of what the "lowest part of air cell" is? I don't want to interpret it wrong. This is my second attempt at incubating eggs. First time was not successful. I think I drowned them in humidity. I bough multiple hygrometers and calibrated them. I have 7 eggs that are still kickin' on Day 18. Wish me luck!