Unpleasant foot odor is something that is observed a lot by Podiatrists. It is a common problem for those who have it (and the people around them!). The key method to tackling the odor from feet is to minimize the sweat and prevent the deterioration of the constituents of the secretions that lead to the odor. Masking agents can also assist in this situation. https://ipodiatry.org/smelly-foot/4115/