windows fog up at night

[chimaera15]

Lately with the weather change, every time I take my car in the evening the windshield window and rear window fog up. I've tried turning on everything from heat to ac, to opening windows and nothing unfogs them. It gets rather annoying since it impairs my vision. Any suggestions?

[mau108]

AC should do it for the front windows and the rear should have its defroster...

There are stuff like FogX which they sell at part source and ct, you can try applying that...

[B0000rt]

AC should do it for the front windows and the rear should have its defroster...

There are stuff like FogX which they sell at part source and ct, you can try applying that...

Yeah, most cars, usually automatic climate controlled ones, when activating the windshield defogger, will automatically engage the air conditioning compressor.

[DJ_Peanuts22]

I recommend you use Rain-x Anti-fog, works wonders on rainy nights

[AzNCrAzYcOoLeR]

I recommend you use Rain-x Anti-fog, works wonders on rainy nights

I second to that

[boneca]

You could buy anti-fog sprays that help reduce fogging on the inside of car windows, but the spray must be constantly reapplied to remain effective.

Good luck ;)

[BuildBuyBreed]

Front and rear defroster, AC (which is automatically on when front defroster is too), turn on the wipers and give it a good spraying with fluid, roll down your windows and let the seal (if it's tight) wipe the fog/mist off.

[DragonZealot]

Lately with the weather change, every time I take my car in the evening the windshield window and rear window fog up.

I presume this is not the first year you own this car. Did this happen at the same time last year?

I don't see how the recent weather change could cause windows to fog up. If this happens on a non rainy day, you might have a ventillation problem with your car. Using Rain-X is fixing it at the symptom not at the source.

1. Make sure the ventilation is on fresh air not on recirculation.

2. Make sure the fresh air mode is working, ie it is getting air from outside. To test this you can spray some air freshener at the outside below the windshield and see if you can smell it inside with all windows closed. Also make sure you hear the vent door moving when switching ventillation mode.

3. If this is an old car there might be a hole in the underbody and water is entering the passenger compartment.

You have to fixe this before winter. When winter comes the fog will become ice after you parked your car for a couple hours and it will take a long time to deforst.

[Becks]

Useful advice, thanks!

[Bazooka Joe]

...

1. Make sure the ventilation is on fresh air not on recirculation.

...



We have a winner here. This is very likely the culprit.

[zexxon]

I had a somewhat negative experience. I don't know if I applied too much Rain-X on my windshied during the summer/fall, but when the cold winter season came, my windshield developed a thin layer of frost. I'm assuming it was from the rain-x because it never happened to me before. It was so annoying because I had to use the defroster to get rid of frost on both inside and outside of my windshield.

[DragonZealot]

Water in warm moist air condenses on colder surface this is the law of physics. Rain-X is not going to change this.

As I said earlier you have to fix this at the source not at the symptom. Find out why so much humidity is in the cabin and fix accordingly.

Rain-X did not cause this it is the humidity that caused this. It never happen to you before because the moisture was not there LOL.