Hi
I see you clean the frames, sill and then the window.
Try to clean the frames and windows first and then finish off by doing the sill. The sill always has dirt on it and you could be transfering that dirt back onto the window.
I know many will disagree, but rinsing with you brush just off the glass is also better to start of with.
I remember reading Dazmonds posts about his initial WFP experiences - he seemed to give us daily updates of his experiences and beginners frustration. Well worth a read, as he has succeded in mastering the art of WFP and getting through those initial stages.
My experience was the same as Dazmonds, but today as experienced WFPers we don't seem to have as much grief with new cleans as we did at first. I am as cautious and will always go back and check each window after they have started to dry off for problems.
You will get there in the end.
Spruce