Are you checking that the membrane doesn't have active red blood vessels, then tearing that little bit of the membrane enough to see the chick? Just be sure to not wrench it apart, but to go 1/8" at a time, dampening, checking for blood vessel, tearing to where you can see the baby. Do this in a steamy bathroom, if you can, or in the steam from a pan of boiling water or a teakettle - far enough back not to cook anything, of course - and it will help.