So, Dry Hatch- how dry is dry enough? Or too dry?

[Coops Dad]

I've had mixed results in my Nature Right 360; some batches have 80% hatch, others only 50%. It runs 45-55% humidity for the first 18 days, then 65-7/% for the final stretch after lockdown. I'm trying a batch of 22 eggs on a dry hatch to see if it gives better results. So far, through day 3, it's been holding steady at 25-26%.

Opinions on dry enough or too dry? Should I run like this, then add water and bump the humidity later? What should I be looking for?

Thanks!

 

[Willawong Hill]

I've never done a dry hatch so hopefully someone who does will be along later, but from what i've seen on BYC previously, 30% early on dry hatch I think and still move to 70% at lockdown, though I have seen some only go to 50% so i guess it depends on what you want to try. May be worth weighing eggs to check they lose the correct amount of moisture or mark air cells every time you candle to check how much water is being lost.