I have gotten glued in chicks the last two hatches. The first several hatch out just fine. The last few seem to get stuck in their egg. Almost like they took to long to get out their egg dried out. My temp set at 99.5, I have a forced air with egg turner. My humidity it spot on at 25% the first 18 days, and the 65% until everyone hatches. I cannot figure out what is going wrong.