I had a rental house that I moved back into. I don’t think the windows had ever been washed. I had Flagstaff Window Cleaning come out. I couldn’t believe my eyes. They are sooo clean!! I mean spotless and sparkling!! I couldn’t be there so I left the door unlocked. He did a fabulous job. Locked all the doors and windows. And didn’t let the cat escape. It’s not often you find a company that does such good work. The other window companies never even called me back.