It sounds easy doesn't it? This WFP lark...I mean, what can be difficult about washing a window with a brush on a pole and a constant feed of pure water?
As several of you are finding, it isn't that easy at all, there is just so much more to it than meets the eye.
I have some accounts where all bar one or two windows come up perfect, but it is always the same couple of windows that don't, maybe it's the sealant thats used to glaze the pane in, maybe for some reason the surface of the window frame is awry, or maybe even it is just one of those panes of glass that always spots!
Upstairs windows, tough, live with it, downstairs windows you can just quickly nip round and drag your squeegee over the odd pane that you know doesn't come up right.
But ultimately it takes experience.
You will get the odd pane that will spot, and sometimes it is just a case of working out the right technique for a particular house or window.
Even with work done trad there can be errors and mistakes, some modern glass on patio doors can be a right sod to get right
And then there are kicks, smears, lines, poor detailing....
Often these are mistakes best viewed from the customers perspective..FROM THE INSIDE!!
In the past I've often had an inside and out to do (Trad) only to find I've got to nip back outside and pick up a couple of runs or marks of some description.
AS for speed; now that really does come with experience!!
No good turning down your flowrate and then trying to work quicker than before! Wrong way around!!
On the occasions I need to turn my flowrate down a long way, I always slow down and take more time.
To work quuickly you need a healthy flowrate, but you also need to have the ability to work quickly and effectively with a high flowrate too
AS time passes you learn how quickly you can work with a given flowrate, too high a flowrate (before you are used to it) and you are just wasting water.
Ahh yes...waggle a brush on a stick...easy innit
.....not
Ian