How to Clean the Inside of Your Windshield, Even at Its Greasiest
by Elizabeth Yuko from Lifehacker on (#5DJ2R)

It's no secret that the outside of your vehicle's windshield can get very dirty, very quickly. Having windshield wipers and fluid in place for on-the-go cleaning definitely helps, but sometimes, the smudges that are making it hard to see are coming from....inside the vehicle.