I don't but I know a number of people have. Most do not report any joint freezing. One guy who did reported that he put the frozen joint in his mouth and that thawed it enough to collapse the rod. I suspect that one of the hand warmer packets that you might want to have anyway would probably work better. I don't think it is a big enough problem, and any of the things you could do to try to prevent it might have even worse unintended consequences, so I would just carry a hand warmer packet and not worry about it.