hope you never drank,and a head outa the window driving is a sure fire way for an endorsement,mind you,i wouldnt scratch my screen with a lighter,just in case i wrecked it for the NEW MOT ,

just let it warm up,before driving,its a poor excuse to run over someone or crash cause,"my window was frosted!",by the time the police arrive ,it wont be,if its not smashed that is.

warm water in the morning is a good way of ridding the frost not boiling tho .