So I have a question: I had some problems with membranes drying and trapping some chicks in the egg, but not others. Even with my getting in and out of the incubator my humidity never dropped below 80, and also I'm in ohio where our native humidity is in the 60s. I'm using the Nurture Right 360, maybe the sensor is broken?
I have 2 Nurture Right 360s, an IncuView, a Hovabator, and a Little Giant. One thing I've noticed is that all of them return to humidity faster than I expected but varying speeds. The 3 plastic ones definitely regain normal temp and humidity levels faster than the styrofoam ones but after doing so many hatches I 100% see a difference in how quickly the membrane dries when I have opened an Incubator vs not opening it regardless of what the hygrometer reads. So whenever possible I try not to open the incubators but in situations where I do (like yesterday when I opened it mid zipping to add another egg) I will actually warm some distilled water in the microwave and put a few drops into the incubator. The warmed water creates steam which actually seems to increase the humidity properly, just don't add too much as it works really well and can cause the humidity to spike or even increase the temps in the incubator if you add too much or heat it too much.