I have been trying to hatch some eggs for 4-H using eggs my chickens have layed, but I have been encountering problems. I have tried incubating eggs, 24 of them, but they all died. I tried again with a incubator twice but they all still died, most of them dying from bacteria and stopping of growth. I had the humidity around 50% for days 1-18 and increased it to around 80% for the rest of the time they were in there (which was day 25). The temperature was always at 100 degrees Fahrenheit. I am trying to hatch eggs with a broody hen and it is day 22 and I haven't heard a cheep. Can someone please explain what I'm doing wrong? Thank you.