Does anyone have any links to websites that show how to clean the outside your windows in a tower block of flats. There must be a guide how to do it safely especially at height. I am talking about doing it yourself and not by absail or anything (am on 12th floor). Not all windows open fully so what is proper way to do it (only open a foot for safety reasons). I know its a strange question but am curious! Am, not interested in the magnet or let the rain wash them, please am genuinely looking for an instruction sheet/manual. I am looking to prove my landlord wrong on something so would be good to have documentation to prove things.