Hello McWoukinn,
I think we have struggled with same issue. I read that 60% humidity was best. I now have found that humidity% is a relative amount. Where you live, altitude and climate and such, play a big part.
I was drowning my peachicks with 60% and all but 1 died at different stages just before hatching. I had 2 that looked completely developed and there was movement then none. I have learned that the best results with the water test is wether or not there is movement. Once I realized there wasn’t any and they were past the 24 hrs of last hatching day window, I opened them. They died just in last hours from hatching. I now feel it was caused by too high of a percentage of humidity. I read also to up the humidity during hatchdown stage.
I had one Peachick survive and luckily I was advised to order some chicken chicks in advance so they arrived at my peachicks hatching date. They teach the Peachicks how to eat and drink and prosper nutritionally. I put only one with my surviving Peachick. I am so relieved. My 5 day old Peachick is healthy, eating and drinking well and boned with his/ her Granny chick. They chortle and Peachick does not peep all of the time. Only a little at times.
Now I am trying again with a new batch of eggs and have lowered my Humidity level from 60% to 54% for now. I am still working on optimum %.
Good luck. I’m sorry about your peachicks.
Keep trying. Peachicks are amazing and the learning curve can being steep and painful but it is worth it.
Carol