You can take a warm, damp wash cloth and wrap the egg 1 at a time until the membrane is soft and start to peel it off. At day 24, they are really in trouble because they have about used up their yolk and are pooping in their egg. You will also have bleeders as you pull the shell back. It is going to be a lot of work and maybe you can save them but I think everybody who hatches have gone through this in the beginning to learn not to open during a hatch. Good luck!