What is the hazy film that accumulates on the inside of windshields and are we breathing all of that stuff into our lungs? Is that bad?

Question

What is the hazy film that accumulates on the inside of windshields and are we breathing all of that stuff into our lungs? Is that bad?

In: 3

Answer 1

If it’s cold outside the humidity in your warm breath can condense on the cold glass. In that case it’s just water.

Sometimes you’ll also get a fine layer of dust on the interior surfaces of the car if your cabin air filter isn’t doing a great job. Pollen, blown dirt, volcanic ash, shed skin, car exhaust…

You’re breathing all that stuff in all the time. Most of it is harmless, some of it is not.