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!
I hit on by storing my hunting clothes in a trash bag with dry baking soda. It kills all bacteria, hence odors associated with bacteria. You could just put socks in a bag and shake them up before wearing them. Also, you just sprinkle some in your shoes.