A dear friend and neighbor alerted me to a great product by Windex called W. outdoor widow and surface concentrated cleaner. You just screw the spray bottle onto a garden hose !! Forget about hiring the flaky tradesmen,,,It is sooo easy,,,I do recommend you first close all windows, especially the second floor ones, then go around the house with a good spray nozzle on to wet the glass first,,,,Then come back to the start window and hand screw on the spray bottle of Windex and spray on the concentrate lightly,,,let it set for a few seconds like maybe 15-20 seconds, and then turn the dial on top to the rinse position and you will be quite amazed at how well this stuff works,,,especially if you are a senior and trying to keep you house without paying an arm and a leg to every lousy tradesman that says he will do a good job,,,It's a S.C. Johnson product so you don't have to worry like with Dow or some other less careful--teflon pfoa/bad chemical-- company. A little hard to find in the stores , but a very good product ,i thinnk.
