Ahh! That's no good! I honestly don't know what to do but I'd like to find out too. If I were you I would get a warm wet wash cloth and wipe the eggs..maybe just not where there pipped unless some got on there. Wipe the walls down and stuff, as for the chickies as long at there's no grossness on there faces or bums Id let them be till there all hatched and able to be move to the brooder then get a little warm water and dish soap on a rag and wipe em down. Eapecialy there feet if they were walking in the egg crap. Make aure the brooding area is eapecialy warm so they can dry quickly and not catch a chill. You could also put a small towel in the microwave for 30 sec or in the dryer and put them on that to dry and put that in the brooder for a little while. Good luck! Hope there all healthy and thriving!