Number one, and this will be hard stop candling the eggs. You don't need to handle the eggs often. Keep the humidity high. And that may help keep the egg from drying out. So don't open the container every day or several times a week. If the egg does develop a fungus,you can put a little foot power on the egg. With out getting it in the egg. The less you handle the egg the better. Keep us posted on your progress.