Should the membrane have a more transluescent look and no blood, or very little, present, carefully peel back the shell and membrane that covers the chick to expose the front half of the head and a bit more of the body. Try to stay away from the pointed end as much as possible. After you peel away the membrane over the chick's head use a soft tissue or cloth and rub the membrane edges back over the remaining shell so the membrane does not dry to the chick and impede its progress as it tries to hatch. With this done return the egg to the incubator to warm up. 15 to 30 minutes later peel away more of the shell and membrane until there's enough gone so the chick can wriggle out when it is ready. Do not expose the head completely or pull the head free from its original position. I never remove chicks completely from the egg. If any yolk is not absorbed by the chick's body the chances of survival are greatly diminished. The chick will emerge when it's time. Good luck.