I've been continuing with perusing this thread & I'm seeing some poor hatch rates. I am truly sorry for all of your troubles, folks. I believe I could have had an even better than 75% hatch rate (possibly closer to 100%), if I had just kept the humidity down to 65-70%. I had temp spikes at 103.1 sometimes that had no effect on the first batch of my staggered hatch. Once pipped, they zipped rather quickly & hatched. I saw problems in my second batch when humidity had increased from 72-77%. I will cease using the LG still air, as it was a LOT of work to monitor it! Too much stress, but a great learning experience! Thought I would just share my experience at this point, since humidity was never mentioned when problems occurred. Hope this clears some things up for you folks. Better luck next time, or getting a broody!