That's surprising, I used to live in the artic circle and I never managed to freeze any capacitive screens, despite being outside quite often. Perhaps because I always carry my phone in my pockets, not in a bag. The problem was gloves though, or the inability to use a tool/pen/stylus/key to contact the screen. I know some capacitive-friendly gloves exist, but these are not serious gloves, and no need to mention how inaccurate it can get when wearing gloves.