Hard to say on that @ched999uk. I generally aim to do a simple fast but very important to me, grid pattern.Interesting point. My flow rate is limited by backpack but when scrubbing I am currently going vertically across the window then side to side from top to bottom then rinse. This is on 6 weekly repeats. Do you think I might be scrubbing too much?
First agitation stage : Horizontally across and back a couple of times on the top of the frame and top of the glass to loosen the dirt there and start it draining down. A swirl in the top corners as I go to remove spiders. Then across and back using slightly overlapping vertical agitations on the vertical frames and the glass combined.
Then second stage, combined agitation/rinse:
Slightly overlapping descending horizontal agitations which are a combination of agitation and rinse on glass, regardless of whether phobic, phylic or leaded. Brush on edge if I can (swivel) with the action being as a descending wiper blade. Continuing down. Perhaps a bit of a scrub on the horizontal frames to remove spider droppings if needed and ending with a few swipes across the sill to finish with the brush flattened horizontal again (swivel). Which will often entail a bit of quick scrubbing to remove dried in dirt or droppings.
The brush never leaves the work, ie combined horizontal agitation/rinse on the glass (100 degree fans). It's all done like a military drill, with light easy twists of the pole to change the brush from horizontal to vertical orientation.
Once the water is switched on for the first upstairs window, I go smartly across all the top windows on that side, usually the water stays on for all the windows on the same level at each side rather than switching on and off for each window which takes extra time, faffing and energy yet saves very little water if you're working briskly. I simply and smartly move the brush to the next window as I stride across. If I'm really on form I often leave the water on for both levels of the same side if there's not too much walking involved to start the lower level. A good flow rate throughout. This is the advantage afforded by having a substantial van tank capacity.
Get in the rhythm and it's almost like a dance with the pole, brush and leg work combined. The time and energy saved with keeping things precise and fluid is more than might be realised. No pun intended with the fluid.?
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