CHECK:
freon....also high humidity and running AC also causes slight haze... til humidity is reduced in the cabin...

Or possible coolant sepage....Does it smell like anti-freeze or oil Duane?

Also probably unrelated, but you should check and replace your cabin air filter if you have never done so.

how do i check and replace cabin filter?

It's underneath the cowl on the passenger side. You haev to set your wipers up and turn the key off, then there are a few things you pop out, lift the cowl up, and there is your filter. I need to change mine. I haven't done that in a couple of years.

Mine does the hazy thing and smell when teh a/c compressor is on every once in a blue moon.

ok i will do asap. but i get smell even when everything is off heat or a/c

just changed my cabin filter so i will update on any smells if they are still there

Sometimes bacteria can also build up in the cars vent system. A can of lysol sprayed into the cowl while the car is on max can help kill it

just changed the cabin filter but havent driven long enough to see if that correct issue