I have a total of seven that I use. I replace the sock after 3-4 days. I take the used one and use the hose to blast all the crud out of it and then it goes in a bucket with water and a little bleach. When i'm down to the last sock, I take the bucket with the used socks and put them in the washing machine. I turn them inside out and wash them ( no detergent or bleach), then turn them inside out again and wash them a final time. Let them dry for a couple of days and then they are ready to go.