Do Wipers Work Better With the Defroster On?

It seems that sometimes when you’re driving in cool, wet weather, it’s hard to keep your windshield from fogging up. The wiper blades wipe the windshield but they leave streaks. The outside of the windshield is clean but the inside is all fogged up. What is the best way to keep your windshield clear in cool, wet weather?

Keeping your windshield clean and clear depends on a few systems working together:

  • Windshield wipers
  • Heating and air conditioning system
  • Windshield defogger (defroster)

How systems work together to keep a clear windshield

While it may seem obvious that the windshield wipers, the heater, and the windshield defogger need to operate, air conditioning is also an important factor. Air conditioning does more than provide a cooling effect inside your vehicle. It also removes moisture from the interior, whether the air temperature inside is warm or cool. The drier air helps prevent the inside of your windows from fogging up in any sort of weather conditions. Air conditioning works especially well in combination with the defogger to not only dry the fog from the inside of the windows but to remove it from the cabin altogether.

The windshield defogger blows air directly on the windshield from the dash when the heater controls are set to the defogger setting. The air movement "dries" the moisture from the windshield, and clears the windshield for improved visibility.

The heat from the defroster also melts ice and snow on the windshield to allow the wiper blades to clear the windshield well. Some vehicles are also equipped with a couple defroster lines where the windshield wipers park to assist in melting ice and snow from the windshield in that area. That way the wipers don’t get stuck to the glass and can continue to clear the windshield properly. In that way, the wipers work better with the defroster activated.


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Rafael

26 years of experience
39 reviews
Rafael
26 years of experience
Mazda 3 - Brake Pads Replacement (Front, Rear) - Oakland, California
Rafael is great. He's nice, calm, takes his time, knows what he's doing. Competent and honest. Highly recommend him.
Mazda 6 - Brake Pads Replacement (Front) - Rodeo, California
He was amazing! Was even able to do additional work that was needed for my brakes in the same day. great work! would highly recommend.

Aurelio

35 years of experience
18 reviews
Aurelio
35 years of experience
Nissan Maxima - Brake Pads Replacement (Rear) - San Antonio, Texas
Aurelio has done it again!!! Great service and completed faster than I expected. Very happy to say he is MY mechanic for any and all my car maintenance. Great Trustworthy person all the around and extremely knowledgeable. I appreciate him always taking the time to explain car stuff and answer any questions I have.

Pierre

8 years of experience
109 reviews
Pierre
8 years of experience
Toyota Venza - Brake Pads Replacement (Rear) - Stoughton, Massachusetts
Arrived earlier than scheduled and completed all the work required. His demeanor and knowledge was great and I am very happy with the work!

Bryant

11 years of experience
405 reviews
Bryant
11 years of experience
Scion iA - Brake Pads Replacement (Front) - Carmel, Indiana
This is my first time using this service. I am very happy with it. Bryant was very knowledgeable and did quality work. I will use this service more regularly.

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