How to Clean Commercial windows set in 2″ deep frames

The best method is to clean in horizontal lines – one level at a time, and then ‘return -to-start’ – don’t zigzag – this gives time for any water that is going to drip or get windblown to do so before the next level starts to be cleaned.

On a windy day, we would often pinch the hose and pull the bottom edge of the brush along the sill like a rough squeegee job to clear the excess water…


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