Frost on *inside* of Windshield

Make sure the inside of your windshield is SUPER clean so any moisture won't cling to it. Use something like invisible glass that cleans it really good and doesn't leave any streaks

 

I have, but I live in a lot colder place than you. It's not uncommon for me to track snow into my car where it is later melted by the heater. When the car is parked it starts to cool down inside. Some of the water vapor from the melted snow will freeze on the inside of the windows. It's pretty much normal winter operation.

The remedy for this is defrost. The Prius has an excellent defroster.

Tom

 

I have had it happen to me almost every morning when I was driving a school bus for 11 years. Moisture has an amazing tendency to cling to anything and if the windshield is not absolutly clean it will make it worse. Moisture will get into any car, they are not sealed like a submarine.

 

I have NO idea why you said that! I was trying to give you a possible solution to your problem. I guess I'll just keep quiet this place is not the friendly place it once was I guess. :-(

 

I don't think you are an idiot. You have a concern due to an experience that you don't expect. Since I didn't see the frost I can't say if it would concern me or not.

I can say that I have never owned a car that didn't get frost on the inside of the windshield during winter in Chicago. As much as I have ever assumed, this is why the defrost setting exists on the automobile climate control of every car I've owned. Typically when this frost occurs it is thick enough that I can't see through it until the defroster heats it beyond the melting point and then evaporates it. When I'm in a hurry, I've been known to use my drivers license to scrape the frost off the inside of the windshield so I can start driving right away.

I've always assumed that the moisture is mostly from me breathing in the car, and perhaps a bit from melted snow on my shoes and clothing. I suspect that the fact that I don't keep the inside of my windshield *super* clean probably contributes to the phenomenon.

Clearly this has not been your experience with cars you have owned in the past. I'm curious as to what cars you've owned that didn't ever experience this problem?

 

Frost or moisture on the inside of the windshield is not an indication of moisture that will damage the electronics, unless the electronic design and testing was severely deficient. Numerous automobiles must endure near-100% humidity environments for extended periods, with occasional cooling-driven condensation.

 

I agree.

I sincerely hope that they are able to resolve the issue to your satisfaction. Please do return and let us know what they fix.

 

Several,
No one thinks you are an idiot, they are just being thorough.
There have been some pretty clueless questions over time, and people are trying to help, but first want to rule out the simple and obvious solutions.
You accuse others of being snarky, when one of your posts was equally so.
Take a deep breath.

 

I can say the same thing for my cars in the metro Seattle area.

When the cars themselves aren't leaking (the Suby was the only one that didn't leak its first winter, but it has a bad one now), there is enough moisture from breathing, wet feet and coats, melted snow from sports equipment, and precipitation while the doors are open, to transport a significant amount of moisture into the car. When parked outside, some of that will condense and freeze on the inside window surfaces.

Seattle just came off a long wet spell, so of course my Prius has moisture inside. It is garaged, but that is not evaporating, and at this moment even the exterior is still very wet from the last rain.

I have had a couple occasions where the amount of moisture inside my Prius windshield was surprising and slow to clear, but it hasn't yet risen to my concern level.

 

I live in ohio and i have had many different cars that have had frost on the inside and in warmer wet weather had condensation on the inside. That is what a defroster is for and the way it works even in winter it runs the ac to take the moisture out of the air. Just may be the ac drain is stopped up or plugged!!! Therefore keeping/trapping the excessive moisture inside the car.

I am sorry but I cant believe in seattle and not have a very humid environment in which the car has to exist, especially this time of year.

Anyway a plugged ac drain might be a contributor.

 

...and where they were driven. A mild climate such as Seattle is a lot different than Chicago or where I live.

Tom

 

Our car had the upholstery cleaned before we got it (we bought the demo). Took quite a while to fully dry out. Really crusted up the first night. Defroster WITH AC on works great. Car is generally frostier than all our other cars.

 

Frost on the inside is a fact of life in Winnipeg. With just me in my car, it's not so much a problem. But after carrying some passengers in the back, yeah, the windows ice up.

You guys have never scraped the inside of the windows with a credit card?