I have a broody hen. She is setting on 6 lovely little eggs, except that three of them have poo on them. Just found it today and it was the thick runny type and it had already dried on. I took the edge of a knife and scraped of what I could. My question is should I try to clean off what is left or leave it alone? If I were to clean off the rest, what is the safest way to accomplish this? This is my first "hatch", so many questions!