My broody hen was sitting on four eggs. On Saturday I noticed either her or the other chickens had smashed one of the eggs. I took the others out but they were so covered with poop you could hardly see the color of the egg. I made the decision after weighing my options to wash the eggs off with a warm damp paper towel. The eggs feel different now (I guess I rubbed that protective layer off) than my others I'm incubating. The chicks are still alive and we are on day 10. How good are the chances of them hatching?