Black Copper Marans: Dry or Humid incubation?

[KEarthman]

I think there is a difference too. I've done 3 batches of Marans, and each time I had issues with sticky chicks or drowned chicks that didn't hatch when running the humidity at the same setting I always used. So, I do them lower, not quite dry, but I aim for 30%.

With the thickness of the whites, and the extra coating on the shell, I don't think they lose moisture as readily as other egg types.

Did you add water and increase humidity at lockdown, or leave it dry the whole 21 days?