Using a lint-free cloth, soak up all that dirty water that’s sitting at the bottom of the window and dry any excess water on the edges of the glass.
But wait! “I have divided-lite (french panes) and the strip washer and squeegee I bought from the big box store don’t fit in the little panes” you say. No problem. Use a sponge instead of the strip washer and then use a hacksaw to cut the squeegee 1/4″ smaller than the width of the window panes. Then use a sharp knife to cut the squeegee rubber to the exact width of the window panes. Now you’re all set to tackle those little guys.
That’s it, you’re done! Now many of you may have divided-lite windows (french panes), storm windows, high transom windows, large picture windows, difficult-access windows, skylights in addition to stubborn mineral deposits, hard water stains, and other challenges that the pro window cleaner encounters everyday. If that’s the case, then it would probably be best to bring in a professional. Now get out there with your squeegee and have fun!