Also I KNOW that the result is 100%...not just hoping it'll dry ok
It does not work like that simon.. If you ask me to clean a window that I have never seen before then I would say it can take up to 3 cleans
1st clean Its reacting to all that dirt and soap on the window there is about 20% chance that it will come good :
2nd clean I'm thinking I will get it right and there is about 70% chance that it will come clean, If they do not on this clean Then I know that I have a problem window and need to change how I clean on the 3rd clean
3rd clean as said above there should be the odd one or two windows that need a bit more time and I can get them right
as for the rounds well if I am honest if you were to go round my work I think you could find the odd run or 2 but lets be honest that is no more difference than an odd scuff mark with the blade...
I can get windows good it just depends on how long you are willing to spend on them...
I never think what the windows will be like when I leave because I ask my customers to let me know... If there is a problem that I will make sure next time I get them clean
If a window comes clean then it will always come clean...
Adders