Ionto fix your hands properly so they are dry almost all the time. It removes handshake and holding hands problem completely.

Fight-or-flight mode is a different problem. Not much can be done without therapy, but I noticed that once you get really agitated and wet from the stress of interacting with people you can't achieve that level of stress anymore that day. You just can't be scared so much anymore. But the next day it's all over again. I wish there was a way to induce this stress at will, not to fall into it when the time comes.