Gran's Remedy. Cooling powder with peppermint oil sprinkle a spoonful (spoon included in the bottle) of powder in each shoe daily for seven consecutive days or until the powder is used up. Gran's Remedy. Leaves your feet, shoes and socks odor-free for up to six months. Any other footwear that you wear intermittently, such as sports shoes, should be treated each time they are worn until the powder is used up. Ingredients: Potassium aluminum sulphate, zinc oxide, zinc undecylenate, talc, Manuka oil, kawakawa oil and peppermint oil. Independent research has shown that gran's remedy is 100% effective for actively treating all five of the bacteria and fungi known to cause smelly feet and footwear. Gran's Remedy. Treats the feet and shoes at the same time.