I know!!!! I found this information after I had already had 3 disastrous hatches. If I'd known to let the bator cool for a little bit every day, I might have had better luck. At least I know now! My plan for next year is to put a regular lamp timer on the incubator, you know, the ones that you use when you go out of town, and schedule cooling every day until lock down. I'll see if that makes any difference.I have often wondered what the trick is that makes brooder always have a super hatch rate over incubator eggs. Now I know. I shall have to try this next time I'm incubating eggs.