Is this what you were referring to?
Equally stupid are the idiots who defrost their windscreens and windows using hot water. Many years ago, I left my car parked in the street outside my house when I came home after a night shift. Shortly after, I heard a bang outside and went to investigate. A woman who lived at the end of the street had used water to "clear" her windscreen. By the time she'd driven less than 50 yards, her visibility was so poor that she'd veered onto the wrong side of the street, smack into the front of my bright green SAAB 99, which was saved by its massive rubber bumpers. I always wonder what carnage she'd have caused if she'd missed my car and carried on out of the T junction.