If you wear shoes without socks, order can start to build up. That’s true for any shoes, but people are more likely to wear barefoot shoes without socks, making it a bigger problem with this particular type of footwear. After wearing my Peluvas, I add a couple of scoops of baking soda to a pair of old socks and stuck them into my Peluvas. The baking soda absorbs the smell and neutralizes the odor-causing bacteria. If your shoes start smelling, pour a few tablespoons of baking soda into each shoe and leave them in the sun for 24 hours. If that doesn’t help, you can hand wash them with warm, soapy water or stick them in the washer using a gentle cycle and warm water.