New to the incubation process. I have a few questions. Eggs are developing nicely when it comes time to get out of the shell the babies pip but never zip. Many have died due to never getting out of the shell. We ended up helping a lot and all the ones we helped survived but I just wanted to know if anyone has had any problems like this. I'm using a cabinet forced air incubator with auto turners. Temp is 99.5 and humidity is steady at 55% and raised for the lock down. Any advice would be greatly appreciated.