For my husband's smelly feet: 1) Use a stainless steel callus shaver to shave off the dead skin (a pumice stone may work if the skin isn't too thick) on clean, dry feet 2) Soak your feet for at least 20 minutes in a pan of warm water to which you have added a 1/2 cup of baking soda. My husband was plagued for years with smelly feet. After shaving off the dead skin (he had tons) and soaking them in BS, it cured the stench. I think the calluses store up the funk. :-)
I was plagued with stinky feet since childhood. I sprinkled baking soda GENEROUSLY into my shoes and wore them. My feet felt wet the whole time but there was no odor from my feet or shoes after one day. I kept doing this for months and have had no problems from stinky feet now for years. This is hard on the shoe so make sure that you are wearing shoes that are not expensive. Ironing your socks may also help. When I bathe I wash my feet with dial or safeguard deodorant soap. I have not used baking soda in my shoes now for years, I only wash them during my bath.