This tool makes cleaning the inside of your windshield less miserable. No instructions are included. The wand extends. Pull it hard to friction-lock it in place. Now, lightly spray the glass with some Windex and use the attached blue pad to scrub an area of the glass. Now, depending on what you can reach, use a towel or the wand with a dry blue pad (6 are included) to dry off the clean area. Repeat until the glass is clean. The included spray bottles may be easier to use because they'll fit into smaller spaces than a big spray bottle of Windex. Use the wand while standing outside the car is the most comfortable position but you may not be able to reach everything you need to. Even used inside the car, this tool is easier than trying to twist your arm to get to the corners and edges.