It's on Day 23 right now, right? That air cell looks really small. It should be bigger by now, like on this chart:
You need to lower your humidity right away, and mist the egg (just the egg, not the whole incubator) maybe a couple times a day. That should help the egg lose some moisture and help the air cell grow bigger.
You need to lower your humidity right away, and mist the egg (just the egg, not the whole incubator) maybe a couple times a day. That should help the egg lose some moisture and help the air cell grow bigger.