Did a job yesterday that I thought would only be a couple of hours, turned out to be the whole day. Never done a proper builders clean in the past 11 years so I'll just have to put this down to experience. What got me was taking stickers off on the inside that had been partly plastered into the wall.You guys that do them all the time what do you charge? For 16 basic windows inside and out I charged £120 way too low should have been more like £320. What makes it worse is I have to do another 2 jobs for the builder at the same prices. I'm thinking in future you should be looking at 7 or 8 times basic price for in and out.Simon.