I'm only on my second go. I tried about a year ago with 6 eggs from a friend. 5 never started and one made it to the end, but never pipped. I think my humidity was way too high. Right now my humidity is running around 35% with no water in the bator. Seems that's as low as the current humidity will allow it to go. I keep checking to make sure that everything is staying fairly consistent and it seems that my temps are not fluctuating at all, but seem to be running about 99.8 which I assume is good enough, although I might try to mess with it and get it down closer to 99.5