I wouldn't mind washing windows if they looked good when I was done. [View all]

Every time I wash windows, I remember why I don't do it very often. Too frustrating. You can work with the best will in the world, the windows can sparkle inside and out, and then the next time the sun shines directly on them, you see the streaks and smudges.

Anybody have advice for window-washing techniques/products/tools that actually work? I'm washing old-fashioned windows with small panes and mullions.

Desperate......thanks!