Love my California duster! I live in the desert south west were it's very dry and there for very dusty. Some times with in hours of cleaning my car I can see a layer of dust building up on it. Now with my California duster I can touch it up in less than a minute and be good to go. I have tried the cheaper nock off brands but they just don't work, all they do is move the dust around. The California duster actually picks up the dust and leaves a clean surface behind. Be sure to break it in first by using it a half dozen times on your car body before using it on glass or it may leave streaks on the glass at first. It actually works better with age. To clean just step away from your car and shake it or tap it on a wall a couple of times to shake the loose dirt out and continue dusting.