Why Are My Car Windows Fogging Up Inside When Parked?

Technical Issues
1

I recently noticed that my car windows get all foggy inside when I park, and I’m really puzzled about why this is happening. I’d love to understand what causes this condensation and what I might be able to do to prevent it. Here are some thoughts and questions I have:

Possible Causes of Fogging

  • Humidity Levels: Could it be that the moisture inside the car is too high? I sometimes leave drinks or snacks in there, which might contribute.
  • Temperature Differences: What’s the deal with temperature? Is it normal that when it’s cooler outside and I park my car, the inside fogs up?
  • Leaking Heat Exchangers: I’ve heard that mechanical issues like a leaking heat exchanger can cause extra moisture. How can I check if that might be the culprit?
  • Clogged Drains: I’ve seen mentions of clogged drains leading to water accumulation. How would I know if I have this issue?

Practical Advice

  • Wipe Down: It seems like wiping the windows with a cloth can help temporarily. Is there a better way to manage this?
  • Drying Agents: Are those silica gel packs or other drying agents worth using in the car?
  • Air Conditioning: Does using the AC help in reducing humidity inside the car?

I’d appreciate any insights, tips, or personal experiences you might have on this topic. How do you tackle window fogging in your own cars? Let’s discuss!

2

Windows fogging up is particularly common during colder months. When the warm, humid air inside the car meets the cold glass, you get condensation. It’s the same reason your bathroom mirror fogs up after a hot shower!

3

That’s interesting! I always thought it was just due to my breath. Can humidity from wet clothes also cause this?

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4

Absolutely, humidity plays a huge role! If you’ve had wet gear in the car, that can definitely raise the moisture level and lead to more fogging. It’s a good idea to air out the car when parked.

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5

Speaking of air, the ventilation setting can make a difference too. Keeping the car on recirculate mode traps moisture. Switching to fresh air can really help reduce fogging.

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6

Great point! I always keep mine on recirculate, thinking it would keep my heater working better. I may try switching it next time!

7

If you’re parked in a shaded area, temperature differences can also cause fogging. Warmer inside air hitting cooler surfaces creates condensation. It’s definitely a good idea to park in sunlight when possible.

8

That makes a lot of sense! It’s like a science experiment happening in my car. Why does nobody teach this stuff in driving school?

9

Haha, I’m sure a lot of us would have benefited from a ‘Foggy Windows 101’ class! Seriously though, keeping windows slightly cracked can help equalize the temperature and reduce fogging too.

10

I try cracking my windows a bit when parked, but often I forget. Does anyone have tips to remember or a reminder system that works?

11

You could stick a post-it note on your dashboard or set a reminder on your phone. Anything to create that habit!

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12

Just remember to not invite unwanted friends (like thieves) with cracked windows! Balancing ventilation and security can be quite the dilemma.

13

True! I guess we need to strategize on parking and ventilation. I might just start doing daily check-ins on my humidity levels!

14

I’ve noticed my car windows fog up too! One way to reduce humidity inside is by using a small dehumidifier. They really help in keeping the air dry, especially in winter.

15

That’s a great tip, tyler66! I’ve also heard that cracking the windows slightly can help airflow and prevent fogging.

16

Using windshield covers can keep your car dry when parked. They also help if it’s raining or snowing, and protect against frost too.

17

I completely agree with you, mitchellkenneth! Additionally, parking in the shade or a garage can help minimize temperature differences that cause fogging.

18

Sometimes, it’s as simple as cleaning your windows properly. A little vinegar and water mix can help reduce fog build-up. Give it a try!

19

That’s true! I feel like I can never keep my windows clean for long. What do you all use for cleanliness?

20

I use a microfiber cloth which helps a lot! It doesn’t leave streaks like other cloths do. Also, consider using anti-fogging treatments available at stores.