They can take 24- 48 hours to hatch after they have pipped so you may be in for a long wait. Once they have pipped the shell- they do rest a while to absorb the yolk and blood from the veins before they are ready to hatch - Once they start unzipping it usually doesnt take that much longer. If I ever open the incubaotr during lockdown- I spray the eggs with a fine mist of water covering the whole bottom of the bator- not just the eggs. It helps get humidity up quicker again when you close it, as it is the surface area of water in there that effects the humidity. The more surface area- they higher it will go. Once the mist helps to increase it temporarily- it will stabilize again.
