While there are many causes of swirls, the biggest culprit is improper washing and drying techniques. They can be avoided for the most part once you learn how to properly wash and dry a vehicle, as well as which materials to use. One trip to the automatic car wash (also referred to as swirl-o-matics), or a quick wipe down with the wrong kind of towel can quickly destroy 15 hours of machine polishing. Even if the local car wash or dealership offers a hand-wash, it doesn’t mean that they are using proper methods or materials, and in many cases can do more harm than good.