Effort? whats that? It disappeared around here a long time ago. A little man in Sainsburys car park cleans it for a fiver, my hard work goes no further than giving him the fiver. I also have 2 Karchers, mainly to do underneath and the wheel arches. One is an original karcher, the other a newish sooperdooper karcher, the old one seems to work just as well, or better.