I didn't open the incubator until 2 days past hatch. I hadn't had a pip. I had two hygrometers that I had just tested, damp salt in ziplock. The membranes were soooo dry. There was so much humidity in the incubator it was dripping from the top. Still didn't matter. I even put the guineas eggs in a day early since I had others going in and I didn't want to open it after lockdown. My temp stayed 99-100. My humidity 65-75 and I raised it at the end for the guineas. The shells were so think on the guineas, that I don't think they could have pipped even if the membranes hadn't dried out. I'm sure I will figure this out eventually, but it just so sad now. Even with hind sight, I don't know what I could have done to prevent this. I won't leave them in cartons again. Too many in the wrong postion. But that could be from shipping.
I do have a question, I read so many people saying they have an internal pip or they know the chick is upside down. How can you know that unless you open the incubator and candle?
I always open my bator, with that said, I dont have a table top I have a cabinet, and a fogger I turn on while the bator is open. My humidity level never drops. I can also see inside my eggs while in the hatching drawer. I rarely handle my eggs for candling either. Plus you can hear and internal pip as the chicks start peeping and there is no external pip, so you know it has pipped internally. You know they are upside down when they pip on the wrong end.