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How to Prevent Car Windows from Fogging Up in the Winter

Do your car windows get fogged up in the winter? See more clearly with these defogging tips.


  • Step 1: Apply an anti-fog spray to the windows to prevent the windows from fogging, and to keep dust and dirt from sticking.
  • Step 2: Stay fog-free this winter by keeping a clean chalkboard eraser in your glove box. When your windows begin to fog, simply wipe it away.
  • FACT: Only about 15 percent of an entire tank of fuel is used for moving the car -- the rest goes to accessories, idling, and engine losses.
  • TIP: The recirculating setting uses the moist air already in the car causing the humidity in the car to rise.
  • Step 3: Keep your heater in the fresh air position rather than the recirculating setting.
  • Step 4: Clean your windows once a week with an ammonia-based window cleaner to remove any buildup or film.
  • TIP: Liquid dish-washing soap can also be used.
  • Step 5: Turn the heat on, and set the fan to the highest setting. Aim the vents toward the window to direct the heat faster.
  • Step 6: Kick the snow off your boots before getting in the car. When the snow on your boots melt, the air in the car will become more moist, causing foggy windows.

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