Sorry to read about you issues with cold feet due to PN. Unfortunately you're never going to accomplish your goal of warming up your feet due to your misconnected peripheral nervous system. Reading the way you're headed you may end up burning yourself or worse. You cannot, so far, regain what you've lost peripheral nerve wise. There are clinical trials currently investigating the redevelopment of peripheral nerves but not so far. Please be careful with your leg skin since you cannot feel temperature any longer?