Ive found over the years the first question 6/10 times is "do you clean the frames".
I've found it to be about 1/50.
Do you live in some sort of grimy industrial area?
People are grateful that they get frames done, but no-one asks.
When I heard you saying (paraphrasing a post or two you made a few months back) you don't get the "good luck" that Ian Giles and Roy Harding get when it comes to recommends I thought it was just you being negative, Rog. - but thinking about it when I have asked custies why they recommended me they nearly always said something like "because even though you aren't cheap you wipe the cills and do the frames".
I've come to the conclusion that doing the frames and cills (even if frame tops and edges are every other clean or third time in reality) is the best antidote to the wfp haters you'll ever get - at best you get good paying recommends, at worst you are tolerated and not dropped.
What does it take to run a brush along the top of a cill and wipe the high eye-ball ones downstairs with an old towel?