We are on day 21 of our classroom hatch We have had 5 eggs hatch and 4 more that have zipped. We have had issues with our humidity throughout the entire incubation period. All eggs that have hatched are not fluffing up and are showing varying degrees of yolk sac infection. Is there anything we can do. Our temp is at 97 and the humidity is at 89 and no matter what we do is hard to control. Should I leave the hatched chicks in there? What can we do?