Hi; I have a black 2010 Civic LX. I bought it last April after having had a 1991 Civic for 11 years. My last car I wasn't too concerned about keeping it super duper clean. I would hose it off at the self- serve car wash and vacuum it out once in a while. I really like my new car and would like to keep it looking good. It seems like no matter what I do, when I wash it, I always get spots on the car when I am done. I think it might be how I am drying it. Any tips? How do I clean the inside ( rough surface plastic dashboard that collects dust ) easily? I've seen a lot of products online for keeping a car clean in between visits to the car wash. Are any of them worth it? Thanks