Any suggestions? I generally use a cable lock with a key, but when it's really cold it's hard to work. The cable gets very stiff and the lock mechanism is sort of sticky. I'm afraid someday I'll be ready to head home at the end of the day and not be able to unlock the bike. I generally will not go by bike if it's much under 20F, btw, but this lock is a problem even when it's that warm.
Thanks!