None of my 4 RIR eggs hatched. I bought them on Ebay, which might have been part of the reason. The tempurature and humidy were both stable throughout incubation. But I'm not throwing in the towel. I'm getting a whole new incubator. (I was previously using the Little Giant Still Air). I have my sights set on the Hova-Bator with auto-turn egg racks, because hand-turning mine 5 times a day was pretty energy draining. And that's a lot of anti-bacterical soap! I'd like to purchase my eggs right here on BYC, and not just 4. I'm more chicken crazy than ever!