Inside Frost on the windshield

[SKIFRK]

During this winter (so far) I have been plagued with interior frost on the inside of my windshiled, thick white ice frost, usually the stuff you see on the outside. I do run the AC with the heater and do not use the inner circulation as I am aware of the condensation this causes. I did not have this problem last year. I`m pretty savvy when it comes to cars; I`m at a lost on this one. I`m going to call the dealer on Monday and see if there`s a heater recall or issue with the inner air button. Looking for help.....

SKIFRKBarrie, ON, Canada

[Leo2005]

I think as soon as windshield defrost you should wipe the window maybe with windex, dry it out and apply some kind of rain-x but the one that doesn't get frozen not sure what its called but you can find easily in any auto store. I don't think dealer will be able to help you with that since it can happen to any car. Windex I think sell cleaner with vinegar premixed. Try that. I had this problem a month ago on rear window inside. Simple cleaned that and never happened again.
Modified by Leo2005 at 4:57 PM 1/2/2010

[SKIFRK]

I'll check with the local auto parts store - they may have a Rain X product that will elimiante the building up of the frost. Someone suggested placing a plastic container with baking soda on the dash overnight. I'll keep you posted....THX for the reply !

SKIFRK

[philipa_240sx]

Very bizarre, I have never had this happen to my vehicles. I am at a total loss why you are having this problem.

[kerrton]

What's the temp and humidy been like in your area lately? This can happen if you get temperatures that straddle the freezing mark (warmer during the day, freeze in the evening/night), and if you get wet snow or rain mixed in this can happen even more readily.

If it warms up during the day, and the humidity is fairly high, you park the car for the night and all the relatively warm, moist air freezes/condenses and releases the moisture into the air where it freezes on surfaces like the inside of the windshield.

Anytime you get temperature swings that straddle the freezing mark with higher humidity this can happen, just guessing this might be the case? This can also happen with heated garages, you drive away in the morning with cab full of warmer, moist air, park at work and when you come out at the end of day it's all frozen ice on the windshield.

Other than that, can you think of any other sources of moisture in your car? I think skiers, hockey players, or tobagganing on days where the temp is just above zero can cause this, everybody jumps in the car all sweaty after the game with their wet gear, drive home and park the car. Over night the temp drops, the wet sweaty air condenses and you've got the same problem.

Just some ideas, hope you figure it out.

[metabo]

You've likely already considered this, but could this be from having wet mats/carpet from snowy shoes. I would check and fully dry out the mats if they are soggy.

Also, you could buy some dessicant boxes (for example, Damp-Rid) and leave them in the car, should at least help somewhat.

[SKIFRK]

I opened the front windows for a minute or two before parking the Rogue for the night; this has eliminated the inner frost for the past three nights. It is -20 C where I live and the cold air may have eliminated the frost. It may return when temperatures are warmer. Again, I never had this problem with any vehicle (30+years). I will be taking out the floor mats and letting them dry indoors to see if excessive water/snow/ice in the matts are contributing to the frost. I've never heard of Damp-Rid ?

Thanks to everyone for your help - I'll keep updating the blog as I find solutions. I'm noticing that the blower inthe Rogue is somewhat weak and does not circulate the air very well. We are a very active family; skiing, hiking, snowshoeing etc., The windows do fog up when the kids get in after a day of skiing, but I have never had a frost issue.

SKIFRK