Eggs from a chicken house of 40,000 chickens are definitely different from a hundred or even a few thousand chickens out on pasture. But when I take an egg out of the coop and it has a chunk of poop on it, I need to get it off. If it not, I don’t. I’ve wondered how they get any poop off of eggs in Europe if they can’t wash them, even with a little plain warm water. 

 You can remove bits of dry matter with a sanding pad. Any more than that it's time to check the nest box design! I'll look up a demo of super efficient egg sorting and packing for you. Might make you rethink a few things!  

 Here you go. https://www.richardperkins.co/2021/07/packing-eggs-fast-and-other-things/ this guy has nailed mobile egg production. And he shares how it's done which is very cool.  

 I’ll check it out. Thanks!