A friend of mine wants to hatch out 70 eggs from my chickens in his incubator. I have 16 hens and two roasters. One hen is now broody so I get about 14 or 15 eggs a day. What do I do with them after I collect them? Where do I store them and how long before they need to be put in the inc? Do they need to be really clean of poop? Anything else?