I've done the same thing myself mate and they're OK, my advice (which ill follow in future myself too) is when its icy, physically prize the blades away from your screen (carefully) an inch along their length before you get in your car so you've unstuck any iced rubber.
I know there's not much room because they tuck themselves away but you can get a hand to the blades enough to do it! Just take care not to tear the rubber if it is stuck!