SklimHave you ever noticed that thin, hardly visible, layer of film on your front windshield?  It looks like smog residue, but that’s not possible.  Maybe it could be moisture from your breath.  But, as you rub some of it off you can tell that that’s not it.  My personal thought is, as I do know what it is, because it is my word, is the bad breath you give off because you forgot (or did not have time) to brush your teeth.  Your mouth can expel no less than 100 billion particles of matter per second.  Does all that just float in the atmosphere, I think not!  Look closely at your own windshield the next time you get in your car.  Oh, did I mention that sklim only forms on the inside of your car windshield?