Aye up Mark, most of people have never come across this before and they think you just taking the mickey when you walk away leaving the windows wet. I've found that if you can get them to have one clean and you do it properly, they're ok with it from then on. The trouble is, when you get a new clean and the customer shows too much interest and follows you around, keeping you talking for ages after you've finished. You'll do well to stick to your guns, I reckon this'll be the norm in a couple of years. I know Alvaston is pretty sewn up for window cleaners so you're doing well if you can get new cleans there. I'd be interested in knowing what sort of system you use. Feel free to e-mail me anytime. All the best, Keith