This morning we got I the rest of the way out. It was glued inside . It is inside the incubator now and looks fine but definitely weaker than the others.
There was an egg that zipped quite a bit this morning and then made no progress all day. I got it out, slipped in a wet paper towel and started pulling of shell with tweezers. I got all the way around the shell and put it back in. I didn't see any blood on the membrane but it looks red and wet...