It is a Repti-pro so I don't know the exact humidity. I try just watching the condensation. The eggs were probably about a week old. They tried hatching on time but I think they went over. After the internal pip, the eggs filled with fluid and drowned the ducklings. It came from inside the membrane. I am shocked I saved two. It took a couple days and a lot of work to get them hatched alive. I have one trying to pip now and it isn't breaking through the shell.What was the humidity the first 20 some days and what was it the last 3 days? How old were the eggs when you put them in the incubator? Did the eggs hatch on time, early or late?