How to stop inside of windscreen freezing

[naffa]

Any ideas on how you can prevent the inside of the windscreen freezing overnight in this icy weather?

Thanks Nathan.

[naffa]

Some interesting suggestions put forward guys.

I dont have aircon so cant try that tip.

I dont have hot water bottles so cant try that.

I've got a kettle and some kitchen towel though, might be wrth a try!