Check out this blog, the author has a detailed summary of all-things-sweaty-feet based on personal experiences and things you can try at home. But also see your doctor to rule out other conditions that may be causing your feet to overly sweat.
If you've tried everything and continue to struggle with sweaty feet (hyperhydrosis), ask your botox specialist about botox injections to your feet. This could be a dermatologist, plastic surgeon or podiatrist, to name a few. This treatment can temporarily reduce the sweatiness but will require repeat injections every 5-7 months, depending on your response. Be prepared to pay out of pocket for this (estimates $1000-$2000) since many insurances do not cover this service.