For those who park outside, you've probably had a problem where it snowed or iced overnight and the wiper tray became a solid ice cube. Here's my solution: Preparation: Use 18" cling wrap. if the temperature is much colder than -5 C use the furniture wrapping kind rather than the kitchen film. Snowed over: Snow mostly brushed off: Plastic wrap removal--no ice cube:
I've known people to use that on the whole car before a storm. Then they come out and bam, clean car!