Does anyone know the cure?

My feet sweat too much everyday even if the weather is not hot...It's kind of disgusting because every time I take off my shoes the smell is too bad and I'm ashamed of it. Some of my friends told me to put some foot powder on my feet before wearing my shoes but it doesn't work. I even tried to put a prickly heat powder but it doesn't work still...What should I do? Can anybody help me?