Help with side windows fogging up
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Elder User
Joined: Sep 2006
Posts: 519
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From: Bountiful UT
Help with side windows fogging up
OK, 1988 F250 7.5liter with factory air, When raining or snowing my side windows will not clear up, My windshield defogs great, What are some things to check?? It has done this for as long as I can remember, (grandpa bought it new) Since I have owned it I have replaced the heater core, cleaned the evaporator at the same time, and replace the blower motor,
Senior User
Joined: Aug 2016
Posts: 182
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From: Mukilteo WA
I'll try vinegar in my soapy spray, not sure what that part does. I know that dish soap in a water spray on goggles or glass will kill fogging. Interior Rainex works as well, I tried it because I swear by Rainex on any exterior glass. You could dab some straight dish soap on a rag, apply and polish, though soapy water leaves less streaks and less elbow grease. It could be that vinegar makes it even easier to get unstreaked, unfogged glass.
Senior User
Joined: Aug 2016
Posts: 182
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From: Mukilteo WA
I think the low tech idea is that anything that leaves a film over the glass that will absorb the moisture and not allow it to collect and condensate will work. If you dive or snorkel, the same trick is achieved by hocking a loogey and smearing it around in your mask to do the same thing. How funny would it be to the neighbors to try and explain snotting up the inside of your truck to test the theory?
Last edited by Daveycracky; Nov 29, 2016 at 05:06 AM. Reason: Auto correct screwed me.
pedant
Joined: Jan 2008
Posts: 23,576
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From: EXTREME southwest CT
The soap reduces the surface tension of the water so it just flows out instead of forming beads and fogging.
(try it on a cold drink in summer)
Wet boots or even human breath are going to create enough humidity to condense on cold glass.
That's why modern vehicles run the air conditioning and recirculate when defrost is selected.
it pulls moisture out of the air, reducing the dew point.
(try it on a cold drink in summer)
Wet boots or even human breath are going to create enough humidity to condense on cold glass.
That's why modern vehicles run the air conditioning and recirculate when defrost is selected.
it pulls moisture out of the air, reducing the dew point.
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