I know what you mean Damo; if it gives you that sense of extra confidence the windows are going to be ok.Final rinse is seconds. Would rather know its gonna dry fine.
Plus I don't use tecbuk brushes so I have todo a final rinse.
The way I see if it needs a final rinse I do it properly, a 2 second rinse with flow rate of 2.5 litres of water a minute means you are only putting out about 80ml of water, hardly enough to do it.
Even 2 seconds on each pane of glass eats into your cleaning time over the week, 2-3 hours or 10%, could cost you 1-2 days in income. That’s just the final rinse; most of the time is taken up with the brush cleaning, that’s why I go on about brushes so much. If I was to use some of the brushes I hear being used on the forum difference in earnings is easily hundreds per month.
Richard
(just use more brush strokes if you dont have a Tecbuk brush)