Hi you don't wash it. I spot clean daily with a slotted rake just to pick up the poop. You don't have to clean it that often I just find it disgusting to let my chickies step in their poop. I rake their enclosure every other week just to keep it even. They love to scratch it up and roll in it. My enclosure is covered so it doesn't get wet in the enclosure and coop. Sand dries out the poop quickly so much nicer than it getting stuck in the hay or shavings. I also sprinkle diatomaceous earth food grade in the coop and enclosure and there is no odor at all.