Why do my feet smell?

I shower every day.

I have shower before I go to work in the morning so I'm clean & fresh.

I wear socks & sneakers as the train is a 10 min walk from my job.

I change into a pair of flats which I bought a month ago. They're not leather.

When I take my flats off to get into my sneakers to go for a walkat lunch my feet smell.

I don't know why it does that when my feet are clean.

Any thoughts?

Why do my feet smell?
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