If you do, I would personally start by making sure the membrane is moist. Make sure you don't see any veins. Especially large fat veins. Check with a flashlight, looking in the hole. Very carefully you can chip away shell. Very small pieces towards the fat end of the egg. Air cell area. Work quickly but very carefully. I use tweezers for this. Never let the membrane dry out and don't let the egg get cold. Stop if u see blood at any time. Use a dry qtip to staunch bleeding. Small chips checking with a good light as you go. Once you have chipped away some ( dime size area) stop and evaluate and keep egg warm, put it back in bator. Ask questions and post pics for better help.