"have you ever noticed your pure water leaves a skin on the glass"
no, can't say I have - what do you mean?
"well when the sun shines I can see a film on the glass"
really? What straight after I've cleaned them?
"no I noticed it after about five weeks"
complaint No2
"Dear Sir, I saw you used loads of water but the bird droppings are still there!"
Drove for half an hour to the house and couldn't see anything wrong. Customer takes me into the house and the massive windows are peppered in pollen marks. Bloody crap wfp really is useless sometimes. Got back outside and again couldn't see a single mark.