I have done the dry hatch, humidity ranging 25-30 until lockdown. I think this is why the membranes are so dry at hatch. At lock down I increase to 65-75. My 2nd hatch wasn't dry like this and I did 40-50 1st 18 days and then 65-70. I have 24 eggs in now but keeping humidity at 40-50 hope for better hatch not so dry.