I have been cleaning windows since November 1976 aged 16 having just left school, like most window cleaners i first started out working for someone else and all my boss used to give us was just 1 scrim, thrown over the shoulder, wooden ladder and a bucket, no squeeges or pockets or anything like we have now, for birdmuck he told us to use a 50p piece to scrape it off.
I must have used scrim for at least the first 7 or 8 years before moving onto squeeges as my main areas are a couple of council estates where until the mid 80s was full of very old wooden framed windows with lots of small panes.
The trick with using scrim in cold or hot weather is to clean 1 pane at a time and switch cloths asap to avoid icing or streaks, also you have to know how much to wring the wet scrim out which you can only get right with experience. I see many young window cleaners struggling to use a squeegee on a small pane when all it needs is a quick going over with a scrim.
