A fogged windshield (in summer) or a frosted one (in winter) can be a real pain. Here are a few tips to try next time you can’t see out your car windows.
What’s the cause?
When water vapour in the car meets the cold glass surface, it condenses, which causes the windows to fog up. If the temperature drops low enough, it will cause frost.
What to do?
The first thing to do is turn up the heat. It may seem strange, but hot air actually has more moisture in it. So, in short, what this means is that hot air will defog the windows more quickly than cool air.
Turn the panel blower on full blast on the defog setting. The air will be directed at the windows and will defog them.
Try shutting the other vents for maximum air flow towards the panel.
Finally, make sure the air recirculation mode is off as this will just trap the moisture in the car.
Obviously, you don’t want to use the heater in summer. So, turn up the AC and direct it towards you instead of the windows. Conditioned air works, even in winter, because it is drier.
First and foremost, check the air filter on your car to see if it’s clean. A dirty air filter will make matters worse.
Check the windshield. Grease on the glass could be the culprit
Get rid of all sources of moisture like drenched car mats.
Crack the car windows at night to keep the moisture out.
One way to reduce moisture inside your car is to fill a sock with kitty litter.
Place it near the windshield for maximum effect or, if you’re worried about what the neighbours will think, put it under a seat.
Be patient. The technique works very well but it’ll take a few days for the sock to absorb all the moisture.
Clean the windows of your car with white vinegar.
Vinegar cuts through grease and therefore helps reduce the accumulation of moisture on the glass.
Go easy on the vinegar, though. The smell might be unpleasant if you use too much.
Did you know that potato starch is an effective antifog agent?
Cut a potato in 2 and rub it on the glass. Let dry and wipe with a dry towel.
And there you have it! You’re ready to see your way clear all year ‘round!
If you don’t see any improvement, ask your mechanic to check for a mechanical problem that might be the cause.
For more useful information, consult our Car section on ssq.ca.