I just got a new Hygrometer from Dickie and they told me that if they dont meet there standards then they dont let them out. So The new one reads 8-10 percent higher then the old one. I have had some hatches that arent all that good, a few chicks day 21, a few day 22, and a few day 23 but never really any good hatches. I keep my humidity 35-40 (so 45-50) and my temp. has been set at 100 so it doesnt drop below 99.5 before the thermostat kicks on. Lock down is Humidity 60-63 (68-72old hygro) temp is still 100. With my humidity 8-10 degrees low what effects would that cause on the chicks? Temp on both hygrometers is the same. I am going with the one that I just got from Dickie because they tested it and said it passed their specs. Pleas any help would be awesome. All eggs are from my own stock which were all fertile and growing on day 10. Thanks all for any help.