I lost one today, a bungalow, he said he's going to do his own windows from now on. For feed back I asked if there was a problem with the last clean, " no there were no problems, it's just I've bought a pole and brush from the supermarket that allows the water from the garden hose to run through it, so I will be cleaning them the very same way as you cleaned them" to which I replied " yes, apart from the fact that you are going to use tap water to clean your windows, good luck with that"!