This is my first post. Been monitoring for a while. Have a 02 with build date of 10/27-10/31. Try plexus for any plastic cleaning including the screen, instrument panel, Tail lights etc. You can usually find it in the Japanese Motor Cycle shops. If not go to http://autopia-carcare.com/detprod.html. This is the stuff Porsche recommends to clean the plastic rear window on their convertibles and it is unbelievable. Seems expensive but will last a long while. I Give it a try.
I find that my biggest problem is the dust that collects on the wood and trip computer screen. I leave a package of Pledge Dust Wipes in the glove box and run it over the fake wood and screen once a week or so and it looks great.
I have found that a couple of quick shots from a can of compressed air works wonders in keeping the screen and the instrument panel relatively clean and clear. This won't solve all of the static clingies but the fewer times I actually have to swipe those plastic panels (very susceptible to scratching and smudging) the better.
I have only used my "little" California duster. I know the material on the duster is coated with wax but I haven’t noticed any build-up, smearing or any thing on the trip screen or the dash plastic. I pretty much use it on everything that isn't leather.
I saw the comment about Plexus above. Am not sure on its use for the Nav screen, but belive it would be OK. Would be great for the Plastic Wood trim though. Plexus helps prevent static build up on the plastic, which helps keep dirt from sticking as much. Very good product on any plastic, use of my convertible rear window and it helps keep it clean.
Plexus builds up a waxy coat on surfaces it hits. This stuff is amazing for plastic convertible windows, paintball masks, and any other exterior plastic surface. But since your nav screen doesn't see the outside, I'd stick to a lens cloth. The best will come from an optician (eyeglass shop) and cost $5 to $10. Ask for a reflection-free lens cloth. They are washable so you can reuse them forever, and totally lint-free.
if the screen actually gets dirty, I agree with the recommendation of screen-wipes. CompUSA (bleh!) carries them cheap.
I like the Micro Fiber cloth too. No streaks and no scratches and dust sticks like a magnet. It works particularly well on the clear plastic cover in front of the gauges and takes off any vinyl detailing solutions (like Armor All) that might have streaked the clear plastic, wood, and screen.
They used to only sell this cloths is small squares for eye-glasses but now they have them at Walmart (car section) and most of the car supply stores in a 16"x12" package of two for $5-$8.