X2I have one of those. SHe can open almost any gate.
Once they are hatched humidity is no longer an issue.
Balancing oxygen and humidity--oxygen wins in my book. I will help a stuck chick if necessary. If gotten pretty good at it!!
I look at it this way.. a chick can get over being a little stuck.. they can't get over being dead from lack of oxygen
some times I wish the incubator manufacturers would leave the vents open and not supply plugs for bators since there is really no real need for them.. so many chicks die during lockdown because someone thought the vents needed to be closed... *sighs*