Some of you might be familiar with the writings of Douglas Adams (Hitchikers Guide to the Galaxy, etc). Has anyone read "The Meaning of Liff"? Basically DNA reckons that there are hundreds of everyday experiences that we have no words for, yet at the same time there are countless words hanging about on signposts that don't mean anything. "Liff" just brings them together! Window cleaning is surely a rich seam for this sort of thing...
How about "Rickling" - a type of knot only found in wfp hoses. Or "Lubbock" - a person who asks if you are a window cleaner when you are up a ladder cleaning windows. Hopefully you get the idea, any suggestions (and keep 'em clean!)?