Hi, I,m a first time hatcher and have 3 duck eggs in the locked down incubator, two of which are pipping. One has been trying for nearly 24 hours and has progressed but I have just looked and a bit of shell has fallen off but what looks like a layer of thick membrane is underneath . So where I would have hoped to see feather looks like another layer of shell. Hope this makes sense. Do I need to help out or not yet? Any help gratefully received. Thank you