John,

Luckily enough, all the windows we have done to date,have had the screens on the inside. Our house has the storm windows, with the screens on the outside. We wash them off with a bucket of soapy water, then hose them down and leave to drip while we do the windows, then put them back in, and move on to the next one.
This is how we plan to do them for the business as well.
Hope this has helped, Kathy



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Northern Lights Pressurewashing and Windows. Ken/Kathy Erb