80% humidity is not too high during hatching. Opening the incubator at that time wil dry things out too much. If your chicks were actually shrink-wrapped (there are a couple really good threads on how to tell), it would mean your humidity during incubation was too low.
if I remember right you are using a home made incubator. You might consider a premade one just to get started, it can be tricky to get an incubator adjusted right and there is an advantage in starting off with something that has the kinks already worked out. I really like my hova bator. Then when you have a little more experience you would be better able to evaluate how a homemade bator is performing.
if I remember right you are using a home made incubator. You might consider a premade one just to get started, it can be tricky to get an incubator adjusted right and there is an advantage in starting off with something that has the kinks already worked out. I really like my hova bator. Then when you have a little more experience you would be better able to evaluate how a homemade bator is performing.