Rinse with de-ionized water, ZERO spots!
are you talking about the gloss black pieces on the b-pillar (portion behind the front and rear side windows)? If so, I use Sprayway glass cleaner and a microfiber cloth to get off fingerprints and any other dust that accumulates on those pieces. Works pretty well to my liking. Any glass cleaner should do the trick just as well, I would just recommend ensuring whatever formula you use is ammonia-free. This is more of a crucial step if you have aftermarket tinted windows because the ammonia can prematurely degrade the tint film, but it's still a good practice to use a natural-based cleaner especially if you use it often enough so that you aren't causing similar effects on the gloss finish.What do you use to clean the black trim on the exterior pillars? Mine have spots.