cheers fella, tried the ecover today on a connie clean, it worked really well on the upvc seemed to get through the dirt easily. I didnt use it on the windows though, put ecover in a seperate bucket as the water was proper dirty when i finished the upvc. used unger for the windows, it is good stuff, expensive but you dont need a lot of it.
any one else use ecover or is ir just expensive washing up liquid, it does work well though so i suppose thats all that matter, clients were well -pleased with the result.