Most people fire up their new pressure washer and start right in on the concrete. While it might look okay while you're doing it, it often drys to reveal lines all over your driveway. The problem is that the tip that a pressure washer comes with is small and not meant to be that close to the surface. Keeping consistent speed and pressure (distance from the surface) is nearly impossible. Not to mention incredibly time consuming to do a large area. Luckily they make an attachment for a pressure washer called a surface cleaner that will not only expand the cleaning area greatly but it will apply constant pressure and speed to the target area making the entire process way faster and more consistent. This will make cleaning your concrete way easier and thus, you'll be more likely to do it.