maybe its just a power thing with me that it annoys me these tax dodgers all have them and do them for buttons and do a shoddy job i just believe in doing a really high quality job and i drive past these shops most days and it really annoys me cobwebs and dirt all hanging off the signs cills rotten the shutter with loadsa crap hanging off it id love to be given a chance to clean them all
Dear me! have we got out of bed on the wrong side? 
I clean mainly shops and am fairly happy with my hourly rate, I give all my customers receipts with my name and address on and pay my taxes. I take pride in my work and my customers want there shops looking good and work hard to keep there businesses running. If they want the sign or facia's cleaned i charge extra but I don't push them to commit to having them cleaned more often because I know just how tough it is on the high street.
It's funny how you think shop cleaners are tax dodgers when we have to give proper receipts !I have always thought window cleaners who clean house might be more likely to do that as quite often no receipt is given, but I'm sure it's only a few who might do that.
im not tarring all shop cleaners with same brush just from experience around my area to be honest