Does The Advice About Pouring Hot Water To Clear A Frozen Car Windscreen In 5He Winter (To Avoid Cracking) Apply To Pouring Cold Water Onto A Hot Dusty Windscreen In The Summer ?

[loo58]

Does the advice about pouring hot water to clear a frozen car windscreen in 5he winter (to avoid cracking) apply to pouring cold water onto a hot dusty windscreen in the summer ?

[barry1010]

No

[douglas9401]

Only if heatwave ice has formed on the glass.

[Bazile]

Only if the water has miniscule elfs with pick axes who tend to chip away at glass

[aelmpvw]

how would you know Baz?

[Hymie]

The latter is unlikely to cause such a level of thermal shock/stress as pouring near boiling water at say 90⁰C on a glass at less than 0⁰C, compared with water at say 10⁰C on glass at 50⁰C.

[Chipchopper]

No, totally different ball game

[Gromit]

Glass does not like a rapid temperature change.
In both winter and summer, you should apply lukewarm water to the screen to have the desired effect.

[douglas9401]

I doubt the presence of small miners in the water given the current state of the elf service.

[nero2024]

what's wrong with wipers washers the water will be the same as outside air for hot weather cleaning, otherwise in winter use a good de-icer spray let the engine run for a few mins (with you in the car) then put demist on

[Old_Geezer]

It's the same physics so the same issue, but windscreen washers don't seem to have a reputation for cracking the screen, so I can't see the stresses being the same, even in this weather. I suggest resisting the urge to put loads of ice in the bucket of water, but then not worrying about using it.