Umm err umm. Brandy and other *hic* Drinks of that nature, does not warm you, it makes the body colder. Its cause the blood vessels to dialate, so therefore shuting down the blood supply.
The image of the ST Bernard dod to rescue you with a barrel of booze is a myth, they were intially used to carry mail. (so no St Bernard out to you. ) Get some hot drinks down you and i dont mean Hot rum either. ;0)
Doh *Dog* soz. got a white furry thing sat on my lap and in way of keyboard.
Oh yes, i just remembered a theroy and it does work. (i tried it.)
To stop your car windows from freezing over or clear frost off, is to get a bottle of cold water with Salt in it, this helps prevents icing up and also clear windows and damn sight cheaper and friendlier than DE-icer.