What about after 24 hours? Also do they breath air inside the shellLeave it alone. You should not have to help it. I'd not consider doing anything until 24 hours after external pip. Please read hatching eggs 101 in the learning center. Many folks who are new to incubation kill their chicks by "trying to help".
I read it twice maybe impatients or scared not sure. I can hear the pip from inside the egg and there is a small crack but it’s been that way all day. No advance since the crack