I just had 7 chicks hatch in my incubator The last one pipped, but I noticed a crusty yellowish substance around the air hole. The chick was peeping and I could see it's little beak opening and closing. I noticed more of the yellow (mostly clear) stuff crusting on its beak. I tried to rub a q-tip across its nostril so it could breathe, but it didn't make it. Idk what happened, but had anyone seen this before? Whatever the yellow stuff was it started out wet, then dried to a crust really fast. I know this may sound vague but I don't know how else to explain it.