I too used to be cleaning my "dark one" every week. (not every day :P). Because we bought it new, and I got fed up in winter trying to clean it up (because I like cleaning it myself - manually, I don't trust machines or other people doing it. might leave scratches ) We got it for a crystal coating. One of my friends have a friend that does this on their yard and they gave me a discount. It was like 700 bucks. (this is half price) But after that, You wouldn't have to clean it that much. Now, I just spray it with water and clean it with my trusty cloth. all the dirt, bugs (i mean everything) just slides off! Now I only soap wash it every month. Not even waxing it as its shiny as hell
(EDIT) I forgot to mention, with crystal coat its more resistant to scratches as well