Back window keeps fogging up, how to stop it?

[scott78945]

I have tried just about everything. I have cracked open the window, then put the heat on full blast, then turned the heat down. Nothing seems to get rid of the fogging up of my back window. The defroster doesn't do much of anything either. Anyone know how to fix this? I already checked the setting and I am having outside air coming in so that isn't the problem either.

 

[alpha]

have you tried the a/c on with the defroster?

 

[kimboy]

When's the last time you cleaned the back window? The fogging may be due to the haze that's built up over time.

 

[AlexJet]

When's the last time you cleaned the back window? The fogging may be due to the haze that's built up over time.

It's a good advice. Try it and you should be fine.

 

[T4RMatt]

How about you try wearing deodorant???? Just kidding of course, do you keep anything wet in the back.....maybe causing the carpeting to be wet. I noticed you are from NY, maybe snowy stuff?? Sometimes if the interior is wet it can cause the fogging you are describing. I would check that and then try cleaning the windows as mentioned. There is also something made by rainx that is suppossed to stop your windows from fogging....but I have never tried it.

 

[scott78945]

I will try cleaning it first. How does one use the a/c when it 20 degrees out? I will also look into the Rain-X product. No one else is experiencing this? I checked my car and its dry at least so no moisture there.

 

[TeryT]

Perhaps heavy breathing due to lustful thoughts?

If you have the front defroster on, the A/C will be on. This helps remove moisture from the air several times quicker than just heat alone.

 

[T4RMatt]

Perhaps heavy breathing due to lustful thoughts?

If you have the front defroster on, the A/C will be on. This helps remove moisture from the air several times quicker than just heat alone.

True, and if you turn the a/c on and crank the heat all the way up this will help clear the fog....

 

[wilsoncwil]

I use the Rain-x anti fog stuff on my windshield and it does work but I am hesitant to use it on the back windows since it might turn the tint purple. The best thing to do is to run the a/c with the heat.

 

[alpha]

I use the Rain-x anti fog stuff on my windshield and it does work but I am hesitant to use it on the back windows since it might turn the tint purple. The best thing to do is to run the a/c with the heat.

you had tint added? the rain-x goes on the outside, as the last time i applied it on my old car, it did.. it would turn the tint purple if the tint were outside.

oh, and what type of tint do you have? fully metallized, hybrid, dyed? if dyed, it'll fade no matter what in a couple years time, if you're so lucky. if the other two, or ceramic, then you should be ok for a while. a good five years or so.

 

[wilsoncwil]

you had tint added? the rain-x goes on the outside, as the last time i applied it on my old car, it did.. it would turn the tint purple if the tint were outside.

oh, and what type of tint do you have? fully metallized, hybrid, dyed? if dyed, it'll fade no matter what in a couple years time, if you're so lucky. if the other two, or ceramic, then you should be ok for a while. a good five years or so.

Rain-x has products for the interior as well. The windshield anti-fog for the interior contains alcohol which makes it risky to use on tinted windows.

 

[scott78945]

Ok, so if I get this right, while I have the heat on I need to put on the A/C button also? Hmm, I didn't think that would do anything but I will give it a shot. Thanks guys.

 

[Bluto]

You may have a drain clogged in your heat/ac system somewhere, turning it into a humidifier. There is probably a drain for the fresh air intake, and another for the AC. The fresh air intake is the grate by the wipers. I don't know where is drains. The AC is probably behind the glove box, or under the dash. Look for a hose in the footwell areas.



You should not have to use Rain-x's Fog-x in a new vehicle.

 

[Spider5]

Ok, so if I get this right, while I have the heat on I need to put on the A/C button also? Hmm, I didn't think that would do anything but I will give it a shot. Thanks guys.

The A/C compresses the air, which takes the moisture out. This is why you always have a pool of water under the truck after using the A/C and why it will help clear the fogging problem.

 

[TeryT]

The A/C compresses the air, which takes the moisture out. This is why you always have a pool of water under the truck after using the A/C and why it will help clear the fogging problem.

Actually, the cold A/C coil (evaporator) condenses moisure out of the air - like on a cold beer can in the summer.

 

[Spider5]

Actually, the cold A/C coil (evaporator) condenses moisure out of the air - like on a cold beer can in the summer.

That is the water that forms on the outside of the system, but water is also collected on the inside.

 

[TeryT]

That is the water that forms on the outside of the system, but water is also collected on the inside.

I'm not clear - it forms on the inside of what?