Just as hydrogen peroxide works to kill fungus and bacteria on your feet, it also sanitizes your shoes. There’s nothing worse than walking around with shoes you can smell from where you’re standing. That means other people can smell them, too. Open your shoes as much as you can and spray them with hydrogen peroxide. Let it dry overnight before putting them back on your feet. You can even get your white shoes looking brand new again by washing them with hydrogen peroxide (Nike).