Excess moisture inside the car cabin is the root cause of fogging. Minimizing these sources helps.

Check for Leaks: Ensure door and window seals are intact and not leaking water into the cabin during rain.
Dry Floor Mats: Remove and dry wet floor mats, especially in winter from snow melt.
Limit Wet Items: Avoid leaving wet umbrellas, coats, or boots inside the car for extended periods.
Ventilate: Briefly crack open windows when multiple people are in the car (especially during humid or cold weather) to allow moist air from breathing to escape.
Recirculation Button: Avoid using the air recirculation button excessively, especially in damp conditions, as it traps moisture inside. Use the fresh air intake setting more often.

N/A - Addresses the source of the problem by reducing the amount of moisture present inside the vehicle.

Reduce Interior Moisture Sources