My feet smell really bad, and I'm sick of it

I've had extremely bad smelling feet for a few years now, and I don't know what to do to get rid of them. I've tried washing my feet and shoes regularly but it doesn't have any effect. I have a feeling it's maybe something like an infection as my twin sister doesn't have it. It's making me really miserable because my parents and sister are always being nasty about it, even though I can't control it. Does anyone have any idea of what may be causing it?

Thanks

Hi there I can't realy tell you a specific cause but i did have a female freind who's feet had an odour problem. She got some potassium Permanganate from the chemist or on line and it solved the problem there is info on line on the subject I hope this is of some help wayne

Try steeping your feet in a basin with organic unfiltered cider vinegar, this will release toxins. If there is any fungus issues, tea trea oil is great for that. 

Short of seeing a podiatrist you can try a moisturizing cream.