Frost/Ice on the inside of the windshield???

A light coating of dishsoap on the inside of the windows helps keep the fog off of the windows that eventually freezes.

Another is to open two of your car doors for like 5 minutes after you are done driving the car for the day.Or just leave your windows cracked open for the night (if it's not precipitating ) This lets out the vapor

Personally I don't like the fresh air setting, it makes the "heat" blow luke warm.

jere wrote: Personally I don't like the fresh air setting, it makes the "heat" blow luke warm.

Then fix the heater.

In reply to Streetwiseguy:

You must live in warm place

jere wrote: In reply to Streetwiseguy: You must live in warm place

I don't and I never use recirc in the winter. My old festiva is where I learned about recirc in the winter being a bad idea.

If your heater is lukewarm, your thermostat may need to be replaced. It made a huge difference in my zx2 s/r, which had lousy heat before a thremostat change. Then it was like a nuclear furnace.

jere wrote: In reply to Streetwiseguy: You must live in warm place

Saskatchewan has warm and friendly people, and it has been a fairly mild winter. Low tonight is only -25.

Streetwiseguy wrote:

jere wrote: In reply to Streetwiseguy: You must live in warm place

Saskatchewan has warm and friendly people, and it has been a fairly mild winter. Low tonight is only -25.

No, it doesn't but he that is wise of the street is right that it's been mild considering it has gone as low as -40°C in the winter.

My Peugeot is a nuclear furnace on any setting. The heater is always on so I have to open the window to cool it off even in 15f weather.

In reply to Streetwiseguy:

Ah Saskatchewan, where you have to pay the hookers just to blow on your hands... Yeah I know you have heard all the cold jokes there are

When that fresh air vent is open it pulls cold air across the heater, making it less warm air particularly if the car isn't warmed up. Being in place where you have to leave cars running all night to keep the anti freeze from freezing you might not understand that problem

Or Maybe it's that most of the cars I have had just have wimpy heatercores or oversized radiators?

Da Trooper's A/C is just barely adequate for the South (no more black cars for me!) but the heater is like standing behind an F-18.

driving with recirculated air takes me back to the early days when that was all cars had. Air gets stuffy, windows steam up etc.

So to sum up... cold temps mean the air won't hold much moisture so it'll condense on something cold (inside of widows). Even one person in the car when its quite cold is putting lots of moisture in the air just by breathing so take these steps in this order to minimize interior condensation.

1. Fix leaks/get wet things out of car and dry them before putting them back.
2. Don't recirculate air in winter at least until the interior is very warm.
3. Use A/C (if you have it) on full hot (A/C=dehumidifier).
4. Crack drivers window if you must, to let moisture out until interior warms.
5. Don't be one of those goons trying to drive looking out a 6" cleared patch of windscreen/ be safe.

petemc53555 wrote: 5. Don't be one of those goons trying to drive looking out a 6" cleared patch of windscreen/ be safe.

I usually try to make the cleared patch at least 12'' dia.