By "wierd material" do you mean the fabric/mesh? I've had my car over a year now, and that stuff doesn't show any sign of wear or dirt. For all the plastic, I use 303 Aerospace protectant. It's the best (imho). It doesn't leave the dash a plastic all greasy and shiny like armor all does.
If you have spilled crap all over the place, then you'll need to clean the plastic first with a mild solution of soap and water.
Then I just dust in between applications.
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