acensor
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Solutions for windshield fogging in cold weather?

Sat Dec 27, 2014 9:29 am

And I'm sure all of you in cold climates know that unlike regular cars we are hesitant to turn on the heater to drive fogging and even heavvy condensation off the front windshield.

Turning on the air conditioning is often quite effective in clearing the window and does use less battery and the heater, but not much fun when it's already cold in the car, and still significant battery cost if on a longer drive without a lot of Rr margin.

I have tried Rain-X anti-fog stuff.
Results are equivocal, and kind of weird. Sometimes it helps a great deal of the times the rain X part of the window seems to fog even more.
And when it is not cold the rain X seems to show a light .....not terrible , but annoying.... Bit of hazy streaking when driving into the sun.

I experimented a little bit with trying to meticulously clean the glass before applying the rain X.with putting on lighter layers of the rain X or heavier layers, etc.
As I say with equivocal results.

I can say that treating with rain X is often better than nothing in terms of anti-fog, but not really happy with it,and yesterday found myself having to turn on the heater as The only way to get decent vision.

Hey, any thoughts more solutions?
Last edited by acensor on Sun Dec 28, 2014 6:32 pm, edited 1 time in total.
Alex
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jray3
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Re: Solutions for windshield fogging in cold weather?

Sat Dec 27, 2014 11:00 am

My back seat is usually full of mouth-breathers, so I just keep the air flowing over the windshield, and if it's wet out, as it usually is around Seattle, I keep that compressor running on the lowest fan setting and neutral temperature. That drops out the moisture before it hits the glass. Main thing is an ounce of prevention- never getting to the point of trying to overcome heavy condensation on the glass.
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NeilBlanchard
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Re: Solutions for windshield fogging in cold weather?

Sat Dec 27, 2014 11:18 am

It would be awesome if someone could try installing a direct heating defroster kit to the windshield!

This would save a lot of energy, and work more quickly than the stock defroster.
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fjpod
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Re: Solutions for windshield fogging in cold weather?

Sat Dec 27, 2014 9:10 pm

Even with 2 or 3 people in the car, I am usually successful keeping the windows clear by simply running the fan on low with no heat or AC. Fresh Air, not recirculated.

jsantala
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Re: Solutions for windshield fogging in cold weather?

Sun Dec 28, 2014 1:01 am

I've stuffed an old pair of kids' pantyhose with silica cat litter. It absorbs moisture quite nicely. Best if spread across the dash.

See https://www.dropbox.com/s/oc6515cz37m0p ... 2.jpg?dl=0
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Barbagris
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Re: Solutions for windshield fogging in cold weather?

Sun Dec 28, 2014 1:54 am

My 2c:

Detergent/soap. Applied inside the windshield until clear.

Test on half windshield:

Image

Image

Worth a try ... it's cheap!
...learning...

acensor
Posts: 365
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Location: Southern Oregon

Re: Solutions for windshield fogging in cold weather?

Sun Dec 28, 2014 6:34 pm

fjpod wrote:Even with 2 or 3 people in the car, I am usually successful keeping the windows clear by simply running the fan on low with no heat or AC. Fresh Air, not recirculated.



Why fresh (outside) air? Shouldn't that depend on how cold and how damp that outside air IS?
Alex
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acensor
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Re: Solutions for windshield fogging in cold weather?

Sun Dec 28, 2014 6:39 pm

Barbagris wrote:My 2c:

Detergent/soap. Applied inside the windshield until clear.

Worth a try ... it's cheap!


Thought of that. Is a traditional solution (pardon the pun).

Did you make a very dilute solution of dish detergent? How dilute?
Wiped on lightly with clean rag?
Alex
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Don
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Re: Solutions for windshield fogging in cold weather?

Mon Dec 29, 2014 6:22 am

acensor wrote:
fjpod wrote:Even with 2 or 3 people in the car, I am usually successful keeping the windows clear by simply running the fan on low with no heat or AC. Fresh Air, not recirculated.

Why fresh (outside) air? Shouldn't that depend on how cold and how damp that outside air IS?
That method works best for me too. I think using the windshield setting with outside air on low fan blowing across the inside of the glass equalizes the temperature and prevents the warmer, more moist inside air from condensing on the glass. Anyway, whatever the 'science' of it actually is, it works!

Don
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PV1
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Re: Solutions for windshield fogging in cold weather?

Mon Dec 29, 2014 10:47 am

I always leave fresh air go to the windshield with the fan off when it's just me, but I have to turn the fan on one click at least when there's other people. I may start trying with the heat on one click, because with no heat the car gets cold fast. I'd love to find a solution that doesn't require letting the cold in. I may try the soap solution.

Piece of advice, don't use the stock washer fluid when it's below freezing. That stuff turns to instant ice.
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