To deal with foot odor and potentially eliminate it permanently, here's a tip. Wash your feet thoroughly with antibacterial soap and warm water every day. After washing, dry your feet well, especially between the toes. Use foot powder or antifungal spray to keep your feet dry and prevent the growth of bacteria and fungi. Change your socks regularly and wear breathable shoes. You can also soak your feet in a solution of vinegar and water or tea tree oil and water. If the problem persists, consult a doctor as it could be a sign of an underlying medical condition.