[QUOTE] Because Ford patented the very fine wiring inside the glass - normal printed-on thick demister wires would be too distracting (I find the Ford ones bad enough). AIUI, that patent is about to expire, though - anyway, decent aircon used properly should render them damn near redundant.[/QUOTE] Really? I have a Discovery with a heated windscreen, and thinking back they were probably owned by Ford when it was made. But surely they'd license the tech for other manufacturers anyway? It is, as you say, bloody good.