I had a wfp customer complain that there were some spots on the windows. I went back and found that the vast majority were on the inside, with maybe one or two over the 40 or so panes. Put it right free of charge with no problems in about 5 minutes, a few more cleans with no problems. Then she tells me that there are always a few spot left behind. I asked her to show me, went round every window and couldn't actually find any. We left it and I said that if there were any other problems tell me immediately and I would return, thinking that this lady is a bit mad but being fair. After the last clean she calls me after TWO Weeks to tell me that there were spots again. In those two weeks it had rained very hard and very often. I checked out the spots and found that they were simply bits of dust that had blown off the field, attached themselves to the windows and now had attracted water droplets. I explained this to her and all was well.
A month later, two weeks before my return visit, I met up with a local window cleaner, nice chap, who told me that he'd just picked up one of my cast offs. Guess which one?... She'd asked him to quote for a trad clean, which he did at twice my wfp rate. Two days before my return she texted me and said she was just going to try another method and could I leave it this month? To which I replied, 'Yes I know, I've spoken to him'.
Goodbye!