SpongeBob SquarePants Rules! wrote:

> Thanks Cap'n.
>
> People vary from using a razor blade to not using one since it may scratch
> the windshield glass.

If everything's clean, it's hard to imagine scratching glass with a
razor blade. If I wanted to experiment with heat, I might let the car
sit in the full sun for a couple of hours before going to work with the
razor blade (this depends a lot on where you live, of course).