loanwizard. even if the temp in the incubator gets to mid 80's, the eggs still maintain the the desired for much longer. it also takes a while for the egg to dehydrate, so by the time humidity goes back up after closed again, the egg would not have even lost its moisture. most people think that the humidity if for the shell, it is really for the inner membrane. because when the egg dehydrates it might look normal on the outside shell, but the the inner membrane is hard as rubber, and looks like a vacuum sealed bag... hope this helps 
