33 is the magic number.
There was a video posted here that said 2? I think it is more complicated though. Frames are a factor and do you count overlaps? I certainly wouldn't go three times over one of the huge lounge windows you sometimes see except on a first clean.So, my answer is "depends". Mind you I got dumped the other day because "on close inspection we wasnt that impressed" so what do I know?
i do 2 sweeps across the top and then a down and up stroke on the rest of the glass. only time you need more is first cleans or bird muck in my opinion
Just wave the brush once in the general direction of the window ...
ruddy hell lee!are your running out of things to talk about in regards to window cleaning? on topic it depends on the job!if theres snail trails then a good few more scrubs,same for pollen off trees etc,weather conditions(i scrub more and rinse more in hot dry weather).if its cloudy and damp then its "splash and dash,give me the cash" sort of thing! some of my customers say(this happens EVERY week)"are you sure you ve cleaned all of them?" if there in when i clean.i simply say "you must of blinked when i cleaned that window!"