I see so much great stuff about DE and finally bought a big bag of food grade kind. But I am not sure how to use it. I have read over and over to "sprinkle" it all over the coop floor but how much is a sprinkle? And my floor is a 10x12. I am doing the DLM so I would love to know cups sizes. Like 2 cups for the whole place overall or 4 cups etc. And like in a nesting box, is it just a dab or a pretty good sprinkling? Thank you for any help. Kim