Unpleasant foot odor is a condition that is noted a lot by Podiatrists. It is a common problem for those who experience it (and the people around them!). The main approach to tackling the odor from feet is to lower the sweat and prevent the decomposition of the constituents of the sweat that lead to the odor. Deodorizing agents can also assist in this situation. https://ipodiatry.org/smelly-foot/4115/