Perhaps I should do a new video on how to handle awkward customers!!! It seems that you lot could do with a few pointers!!! 
I have no problem handling awkward customers. I have many that started out unsure and now pass my number on to neighbours.
Perhaps you haven't actually read the original post, it wasn't a standard, run of the mill 'I'm not sure about all that water' issue. He was convinced WFP blew his last windows, he was convinced they would blow these windows. I explained the science behind what was happening and he still wasn't happy. He had windows that were aleady blown, he stated he would be checking them tomorrow.
Now instead of blowing smoke up your own arse, light in the head from your B&Q pole topic, explain what do you think I should have said/done differently when I knew there were already some blown windows. Do you think a tour of a double glazing factory was in order?
Calm down mate
I'm only trying to help! perhaps you could have pointed out that there were a few window that already had problems, and advised him on how to get this sorted out, perhaps give him the number of a local tradesman who could fix them for him, then do a fantastic job of cleaning his windows and getting his frames absolutely spotless!! The result may well have been a happy customer, converted to wfp, who will recommend you to all his neighboors and friends!!! And hopefully the next time you called, he would be waiting with a cup of tea and biscuits on a tray!! 
Sorry, yeah, was a bit edgy.
I guess he might have turned out ok. I just didn't wan't the hassle of next month being told I ruined some of his windows. I just didn't see him ever coming round.
On the point of replacing his windows, I wish I was in a position to offer a service. A prime example of how we are in aposition to offer extra services and make additional profit.