I just got a new Nurture Right 360 and it tells me to keep the humidity at 50% until lockdown and move to 70%. I have had this thing going for 2 days not most of the time it stays around 50% but changes as the day goes from 46% to 50% but on the average around 49%. I'm no rocket scientist or biologist but I just don't see how this much science can go into hatching eggs. I know that the temp is the most crucial thing, but I know there are not a bunch of hens running around with hydrometers and thermometers in nature checking their eggs status. LOL My brother is a very experienced egg hatcher and he tells me not to sweat the humidity and just make sure the temp is at 99.5. Although he told me to make sure there is water in the incubator and on the last three days of the cycle, make sure that the humidity is at least 65% or more to allow the chicks to hatch without the membrane drying out. I would like a second opinion not to offend my brother, so could someone tell me what they think is the proper humidity?