I find it takes more time and effort to clean the plastic surfaces behind the seats. Gets very sooty fast. Cleaning the dash is a breeze in comparison.

 

I highly recommend Swiffer wipes for grabbing the dust/lint off the dash. Then follow it up with the protectant of your choice (303 or other).

Destiny, my understanding is that UV has no problem passing through untinted glass, i.e. front windshield. All automotive window films I've ever had specified a certain % of UV blocking.