Im hatching chicks for the first time and I had 38 eggs make it to lock down. For the first 18 days I kept the humidity at an average of 40%. Sometimes it would drop down to 35% and sometimes up to 45% but it was consistently in that area. On the night of day 18, I ran the humidity up to about 70%. I noticed one egg had started to peep and was thinking oh wow, this is early. By the next morning I had a chick in the incubator. On the evening of day 19 I had a second chick. Then, on the morning of day 20, a total of 5 chicks with a bunch of eggs peeping. Two of the eggs that had peeped last night made very little progress (like none at all) in the last 24 hours. So because I could not take it any longer, I gave in to helping them out. They were both very stuck to the membrane inside of the eggs and I am assuming that this is what you all mean when you say a chick got shrink rapped. I very gently got one of the chicks free and the other one still has some membrane stuck to it (I left it on for the time being). I didnt want to pull it and have it tear the chicks skin and I figured I would let him be for now. My first thought is that the eggs shell stayed broke for to long and the inside of the eggs started to dry out before they could get the eggs cracked but both chicks were still wet looking except where they were stuck. Im worried about this because I still have other eggs that have peeped, well the egg is broken off a little but the membrane is still not broke thats still in the incubator. The chicks are moving inside of the eggs so I left these eggs alone. If there is something that I can do like crank up the humidity even more (its at 82% right now) please let me know.