To help eliminate interior condensation in cold clims...
If you park outdoors and end up with too much moisture in Winter.
When you drive for any distance, and the inside of the car is warmed up, before leaving the car. HOLD THE DOOR OPEN.. let all the hot air escape. it will take the excess moisture with it.
What happens is the car is cold, you excrete moisture through breath etc.. the car warms up and all that moisture stay inside car because the air is warm and dry.
So then you exit, leaving all the moist warm air behind.
Car gets cold, moisture condenses.. repeat a few dozen times and you got permanet foggy windows every time.
Like i wrote, just hold the door(s) open for a few moments. let ALL the hot air out. And no more foggy windows.
This is not a miracle, so if your car is fog hell, just doing it once is NOT gonna fix the issue. You have to do it every time in cold weather.(the seats pick up a bit of moisture too, but it is mainly the air itself which is the problem.)
Lucky me i have indoor underground parking.