Hot water freezes on windows faster than cold water. I think it's something to do with hot water being less dense than cold water.
Darren, go through the back posts from Christmas onwards; everyone one of them is 'AAAAAAAaaaaarrrrrrggggg everything's frozen', or 'How do I stop things freezing', or 'More snow again, ten foot here', or 'I'm skint and we have no food in the cupboards', etc etc etc.