This thread is not about nicotine in second-hand vapor which has been covered in other posts. I'm curious what happens to the PG and VG. Is it absorbed in the body or is it a component of the exhaled vapor? Surely it is because otherwise the water vapor wouldn't be visible unless you were vaping in a walk-in freezer. But if it is a component of the exhaled vapor, why don't we experience films of it on stuff like our computer monitors? What happens chemically when the atomizer does it's magic?