What's the remedy for smelly feet?

Cornstarch. A less fancy solution to keeping shoes deodorized and dry is to sprinkle the inside with 1 to 2 teaspoons cornstarch.

Salt. Add table salt or Epsom salts to water for a foot soak. Pour a few teaspoons of salt into a tub of warm water. Soak for ten minutes.

Vinegar. Soak your feet several times a week in an apple cider or plain vinegar bath. Mix 1/3 cup vinegar into a bowl of warm water. Soak for 10 to 15 minutes.

Don't use nylon socks and never wear your shoes if its humid. Expose your shoes to the sun whenever you can...

There are many ways to prevent this but the main reason is because of bacteria so try and keep feet dry all day and sweat free.

You can soak feet in baking powder
Wash feet with antibacterial soap
Take Zinc supplements (work for some)
Spray some alcohol on them and rub everywhere

Everyone is different you may have to try a few before you find one that works for you

soaking yr feet everyday might take u time.
There are many cheap foot sprays available.
Avon sells foot creams that fight specifically vs odors !
Mum bought it for dad and it works.
It's a mint scent lotion.