This is almost a "duh"!! While some have addresed the subliminal problem of
increased humidity in the air, the real answer is a mechanical problem. YOU NEED TO REPLACE YOUR HEATER CORE!! It is leaking into the air stream coming across it.

If you turn on your A/C for about 2 to 3 minutes it will lower the humidity (water in air) of the air inside of the car and it does not cost anything....

If you turn on your A/C for about 2 to 3 minutes it will lower the humidity (water in air) of the air inside of the car and it does not cost anything.Also clean your windows with a glass cleaner or windshield washer fluid will help out some.

You can buy sray from Wal-Mart, auto part store, some grocery stores, or order it from the link below but you will be paying shipping.

http://www.comforthouse.com/fo...

Why they fog up is water vapor in the air which is called humidity condenses on the windows because the windows are colder than the inside tempature of the car (below the dew point), a lot of the water vapor is coming from your breath (cold outside you can see your breath = human produced humidity.

Never use fingers or hand to get rid of the fog on windows or mirrors, you WILL leave oil on the glass from them.

Visit this helpful site about this subject:
http://www.dctech.com/physics/...
I hope this helps you.

Car windows fog up when water condenses on them. This can happen both on the inside of the window and on the outside. You can check to see in your mom’s car where the condensation is because it will be wet to the touch.

It sounds like outside humidity might be a problem (especially on the East coast). It is here in Illinois, particularly on hot, stormy days in the summer. Water will condense on a surface if the temperature of the surface is...

Car windows fog up when water condenses on them. This can happen both on the inside of the window and on the outside. You can check to see in your mom’s car where the condensation is because it will be wet to the touch.

It sounds like outside humidity might be a problem (especially on the East coast). It is here in Illinois, particularly on hot, stormy days in the summer. Water will condense on a surface if the temperature of the surface is below the dew point of the air next to that surface. So you need warm, humid air next to a cooler surface to fog up.

If it is very humid outside and you’re running the air conditioner inside the car, water can condense on the outside of the windows. Using the windshield wipers and the rear defroster can get rid of condensation there by wiping it off or making it evaporate.

Often, the air in the car will be warmer than the air outside the car (this happens in winter here). Moisture will condense on the inside of the windows if the outside air is cooler than the dew point inside the car. This happened to me a lot when driving through a thunderstorm caused by an incoming cold front. In this case, running both the air conditioner, the heater, and the vents for defrosting the front window worked very effectively. The air conditioner dehumidifies air because water condenses inside it when the air goes past the cold tubes with the refrigerant inside. Heating it up way past its dew point makes it feel dry, and it is dry -- it’ll help evaporate any condensation that’s on the windshield -- and even more quickly the hotter it is because heat is needed to cause the liquid water to change phase to a gas.

older cares hold the cold better thay have more steel newer cars tend to be plastic but thers not anuff info if the heater core is bad it will steem and culs that to happen but that wount clear up with the defrost it wil get worse i had the same carand now that i see this ?.. thay did fog eazy .... if the heater core is bad u will smel a sweet smell in the car ..try to crack the windo when u get in it to let the body heat out your hot breath then to help fog the windows very fast...

older cares hold the cold better thay have more steel newer cars tend to be plastic but thers not anuff info if the heater core is bad it will steem and culs that to happen but that wount clear up with the defrost it wil get worse i had the same carand now that i see this ?.. thay did fog eazy .... if the heater core is bad u will smel a sweet smell in the car ..try to crack the windo when u get in it to let the body heat out your hot breath then to help fog the windows very fast

The windows on older cars fog up so easily because the window gets rain and snow on it so it attracts fog.

I know on our 93 Honda Accord we always had the same problem & had to turn on the A/C + the rear window defogger to quickly get rid of the fog. You can try the A/C but increase the heat. Then we left the windows open a crack Found out later it was normal body heat & breathing that caused this. Let your car run a bit before getting in to warm it up may help. Good luck!

If they do have a window defogger, either they operate at a less efficent defogging temperature and thet are not strtegically placed as in newer models. The antifreeae used then is ., being that the