When putting my last batch of eggs into the Hatcher I noticed that none of them have visible air sacs when candled. Its just solid black. So far we have had one chick hatch successfully and then another pipped and started zipping and then stopped and died. I ran my incubator at 55-60% humidity during hatching which is what the pamphlet said. I'm assuming that because my humidity was so high during incubation that I have very little to no air sac which is killing my hatch rate? Last hatch was same way. 5 chicks pipped and hatched and the other 31 did nothing.