This squeegee is a game changer for the dreaded window washing. I spray Obey glass cleaner on the windshield and use the Scrubber first to lift the grime. Then spray again and squeegee off. Polish with Larry's Final Wipe glass towel. On the interior, after cleaning, I wrap the Final Wipe glass towel around the squeegee to get into all the tight spots to polish the glass and leave it streak free. Best tool for the job I've ever found.