Is she making any attempt to try and push herself out? I would be inclined to keep chipping at the shell a little at a time- making sure membrane stays moist and then seeing what the chick does. I did twice have to help out with the membrane too- one chick was very weak so I had to take it all off, the other was malpositioned. Weak chick took awhile to come around the malpositioned chick once I opened the membrane slightly she instantly started pushing herself out- both chicks were fine afterwards. There is the chance of messing up and causing damage when assisting which is why you have to go very slow but I’ve had a chick die when I didn’t intervene (malpositioned) so I’m personally more pushed to help out.
It is a personal decision and a very tough call to make
It is a personal decision and a very tough call to make