Maybe as UThobby mentioned water being cold.
I like to run my incubator at 40 percent to start then 60 percent for lockdown. Super hard to control in the foam incubators though. The incubator I have now keeps the humidity for me. It is literally almost hands free.
Is this humidity for duck eggs. Have you calibrated the hygrometer. That amount of water should have it up to 80 plus
I usually run without vent plugs. In fact I don’t where they are anymore.
Do you have propane stove to make hot water bottles? Not to close to eggs. At this point it won’t take much heat to keep them going.
Or under shirt if not too many. And of course if it’s not too long.
Being with PG&E utilities for so long I’ve learned the hard way. Wife saved 4 of the ones I...
Last fall power company turned power off due to the high winds and fire safety. Four days without power. Had generators running, for the house of course. :lau
The eggs had nothing to do with running the generators nope not all.
Hope your power stays on and chicks stay warm in their shipping.