So its that time of year again for frozen car windows. My cars doors are frameless and so I've put gummi pflege on the door seals to prevent freezing and this works a treat. However the lower glass weather strip on the doors, the thing the windows (when not frozen) passes through as the glass goes into the door, how can I stop that freezing to the glass? Presumably product is just going to smear all over the glass. RainX has been suggested, as has warm (not hot) water and credit cards.. any better solution?