... and if you've got one, what do you think of it? I've used them before on Ford Mondeos and the results were fantastic - the screen cleared really quickly.

Last night was the first frosty evening so I turned on the screen heater on my Passat and it was RUBBISH. The rear screen cleared at a normal rate but the front didn't do much until I turned the hot air on. The switch was lit up, I could hear the relay click in, but the screen heater was as much use as a one-legged man in an arrrss kicking competition.

At least the fine wires in the windscreen make pretty coloured patterns when the sun shines, so I've got something to show for my money.

Any good experiences?