Most fungi can’t handle a wide pH range. I discovered baking soda as a cure for athlete’s foot when I used it on my hunting clothes to kill bacteria. Better than spending a fortune on special detergents and UV killers.
So are you suggesting placing feet in a tub surrounded by baking soda (powder)? Or rather mixing baking soda with water and putting feet in a tub of this solution? If so please tell me the ratio and the amount of time required!