Frost Protection on windscreen

[Booner!]

this

kettle is mearly a means a carry a large ammount of water in one go

Just needs putting on for few seconds to raise it to about 25/30 degrees which is warm enough to melt out the ice without freezing again straight away.

By the time that water is at freezing point, your heater has usually got the screen warm enough to stop it falling below freezing

I heard that this can crack windscreens with the rapid change in temperature?

Although, I used this method on my Golf for 2 cold seasons and didn't break the screen...

 

[Glaucus]

You can buy special sprays, you spray on the night and is meant to keep the windscreen clean. How effectiive they are, I have no idea.

I just use the old coke bottle with warm water in it.

I doubt modern glass is effected like old glass is and unless you have a chip. I would be shocked if it cracked.

 

[PiKe]

You can buy special sprays, you spray on the night and is meant to keep the windscreen clean. How effectiive they are, I have no idea.

http://www.choiceful.com/choiceful-id-69091-Magic-Ice-Stop-Liquid-500ml.html