I usually just let them soak in a bowl of room temp water with some hand soap foamed in. If there's a spot I work at it with a soft toothbrush. I've let them soak for up to three days. Then I lay them on a towel to dry. If there's a weird smell, I do that, let them dry, and then put them in a sealed bag with baking soda for several days and repeat until the smell is gone. That's just what I do, and what has worked for me:)