Not matter what some people try, they tend to have smelly feet and as a result of that smelly shoes. That is obviously embarrasing for most of them, but does not mean that they do not have a good hygiene. Some people simply do not respond well to being in plastic shoes all day long, their feet cannot breathe and react to the chemicals in the shoes, so consequently the sweat and the toxins that the body has to deal with make up an unholy mix of odors.
But here is something really easy that you can do to stay on top of that: First of all take off your shoes immediately when you get home! Dust the soles inside with some bicarbonate that you then spray lightly with a blend of geranium, ginger, tea tree and clary sage and leave it in there over night. Remove in the morning with a hand vacuum cleaner or a normal one. That way you change/neutralize the smell and change the environment your feet have to be in all day, every day.
After showering in the evening or morning, rub the same blend of oils (together with a carrier oil) all over your feet and let it soak in before you put on your socks. That should work wonders for the smell and for your health.
Be well and see you soon!