Tap the side of the tip with something dull to get a small crack. Then use your finger nails and break away to the 1/4 mark of the egg. Carefully pull back the membrane, but stop the moment you see blood. Continue to the 1/3 mark, if you don't see blood. The goal is to get to the half mark, but not beyond. The final push has to come from the baby itself, and it will once the yolk is absorbed. Never, ever pull out a duckling. Just remember you have to continue helping once you start to help. It's not a big issue. You stop when you see blood and put it back into in the incubator for another 4 hours before you continue. Some people never help and let nature take care of things, which very often means letting it die. I rather help and have another lovely duckling. I think you will have another nice little one.