I'm incubating is a Little Giant 9300 and the humidity has been pretty constant between 40 and 50%, occasionally jumping to 55%, but then back down for most of the incubation. Now, though, when I'd like to raise the humidity to 55% for hatching, I can't get it above 40, and it's even a little below (38%) at the moment. I have all the water trays filled, and am trying to maintain room humidity. There is no heat running in the house, and I have a humidifier in the room. Perhaps the difference is because I took the second vent plug out to allow adequate ventilation for hatching? Or, I wonder if my hygrometer is not accurate. It was at 90% last time I looked at it, then jumped back down to 38%. That was the only time I've seen that happen, though. It's been pretty steady around 38%-40% since I took out the vent plug. Any suggestions? I know too little humidity can cause sticking to membranes, but they need adequate ventilation too.... Thanks!