NY wrote:
"The Natural Philosopher" wrote in message
news
Why tepid? I run the hottest water I can from the hot tap and fling it
liberally on to the screen. Been doing it for oodles of years with no
problems.

Tim

I pour a just boiled kettle on it

Thermal shock of boiling water on glass that is at around zero degrees.
Don't want to crack my windscreen. Also, I'm not sure whether the rubber of
the wiper blades and the surround to the windscreen (between glass and car
body) would withstand boiling water.



Experience suggests that it can withstand it.

Tim

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Please don't feed the trolls