What is the most efficient way to defog car windows?

I have an Audi A6 and on cold mornings, my car windows always fog up. What is the best way to quickly and effectively defog my car windows?

The fastest way to defog your car windows is by turning on your air conditioning. Make sure your AC is set to 'fresh air' instead of 'recirculate'. This will help regulate the temperature and humidity inside your car, preventing the windows from fogging up.

Another way to quickly defog your windows is by wiping them with a dry cloth. Simply swipe the cloth over the foggy areas in a circular motion until they are clear. This works best for light fogging.