Just after we started cleaning windows wfp we adapted all of the brushes to an over the top fan spray ( bought from a cleaning suppliers - used on the wands of carpet cleaners.
We screwed them in place on the angle of the brush head - so that the fan spray came just over the top of the brush. About 5mm from the edge of the brush.
We did this for all our brushes, upstairs and downstairs.
The only other fan spray I have seen was a Tucker one? that seemed to have it about a foot away from the brush on the angle of the goose neck.
In my opinion no brush will self clean itself quickly enough to not drag dirt down a window if we use the pencil jets (through the brush).
Also if you are lifting off the glass you are leaving yourself prone to pulls and future problems with backs etc and even at a couple of storey this will be aproblem.
With an over the brush fan spray - used properly - so you are not catching the brickwork at the top of the window you have the best of both worlds.
I do not understand why the suppliers have never developed this system. It works - it works excellently at any height and on those commercial or really high windows you know you have at least given it a 100% pure water rinse.
Until we stopped window cleaning full time (back in March) we cleaned some 3 storey windows on a bank head office and got excellent results - using this practise (we had to do the insides as well so we could see how well the outsides had dried) we would clean about 600 3 storey windows easily in 1 day at nearly 15 metres.
Rob

Rob
