My coops all have sandy floors instead of pine shavings. I love the easy cleanup in the little coops using a cat litter scoop. In the big coop, not so much. It sure looks great when new. I plan to make a sand screen to let me quickly shovel the sand into a filter screen to remove the big stuff. This will save me a lot of time. But what to do with the stinky sand that has wet or small "extras"? I read that somebody here washes their sand and dries it on a tarp. This sounds like what I need to do, but what are the detailed mechanics of washing sand? What should I do with the runoff water?