On Fri, 13 Jan 2017 18:20:12 -0000, Mr Pounder Esquire wrote:

James Wilkinson Sword wrote:
On Fri, 13 Jan 2017 13:27:19 -0000, Bod wrote:

On 13/01/2017 11:48, NY wrote:
"The Natural Philosopher" wrote in message
news On 13/01/17 08:49, 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.

yes. helps get the ice off

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.

I can assure you they all can*, but the water is down at around 20
degrees by the time it reaches them.

*black metal easily reaches 100 degrees in tropical sun.

Ah, maybe I'm being over-cautious, then. What about water at 100
meeting glass at around 0 - isn't there a risk of the glass
cracking? I've heard of people that it has happened to in this
situation.

Probably best to play safe and wait about 30 secs after the
kettle has boiled. by the time you get outside it should be well off
of boiling.

Probably 90. I prefer to boil half a kettle, then fill it up from
the cold tap. That makes the glass plenty warm enough to stay
unfrozen until you've got the car going.

You could always fill the kettle from the hot water tap. Oh, hang
on!!!!!!!!!!

A decent kettle boils in a minute or so.

Of course the "logical" way is to cover the windscreen up. This is logical
Mr Hucker.
I got two windscreen covers from Aldi three years ago. One for the back, one
for the front. £1.99 each.
They take seconds to put on and work very well.

But you have to know it's going to be frosty the next day.

--
If Rap is music, then falling off the roof is transportation.