Aplynn, Its been 5 hours and no one has helped you, so I'm going to give my totally inexperienced opinion. I paniced when I saw a chick had pipped low and died, so I opened the incubator, but before I did I'd had an electric frypan in the room steaming to help keep my humidity in the incubator up, so i turned it on full and really warmed and steamed the room. I suggest take the smallest amount of shell off, and watch for bleeding, if nothing go further, checking each time. mine had begun shrink wrapping, and I fully believe had I not helped they would have died. All 8 chicks are doing really well, and I dont regret helping BUT i'm not hatching breeding stock, so am not bound by survival of the fittest. Any bleeding means the chick isn't ready, put it back.
Good luck, I wish I could do more to help.
oh i used long nosed but blunt tweezers to crack tiny bits of shell at a time.
Lea