How to Keep Your Glasses From Fogging Up While Wearing a Mask

Spread the love

This post is by Bernie Carr,

Now that the CDC has recommended that people wear cloth face coverings while in public spaces, I have started wearing a mask when I go out to buy food.
One thing I have noticed is my eyeglasses fog up when I wear a mask. I’ve experienced my glasses fogging up when I go out into the humid air, particularly in Houston. But now, they fog up even indoors because I’m wearing a mask. Somehow breathing into the mask causes air to flow up toward my eyes, fogging up the glasses.
My daughter and I talked about this, so we did an experiment to see what would help eliminate fogging.

What prevents glass from fogging up?

We discussed a few items that are known to help eliminate fog from glasses:

We did not include spit in the experiment, as we are trying to avoid spreading germs. So for this test, we only used anti-fog spray, soap and shaving cream.

What we used:

Photo by M. C.

The test

To test all the three methods, we wiped a section of the bathroom mirror with each item.
After rubbing the substance into the mirror, we wiped off the excess with a paper towel.
Then we turned on the hot shower to fog up the bathroom.
We took photos of the bathroom mirror with the light on and with the light off so you can see the results in the photos below.
Here are pictures of the testing.
Foggy bathroom mirror, light on
Photo by M. C.
Foggy bathroom mirror, light off
Photo by M. C.


Anti-fog spray:

The anti-fog spray was easy to rub into the glass until the patch of glass was clear. Once the mirror fogged up, the anti-fog spray left streaks. It did wipe away easily.


FINDINGS: The soap worked VERY well. It was a little more difficult to rub into the glass until clear.  There were some streaks resulting from the soap being mixed with moisture, but they wiped away VERY easily when touched.

Shaving Cream:

The shaving cream was very easy to rub into the mirror, and cleared jp easily. But it did leave a lot of streaks, and it was the least clear of all three. It still got fogged up and was the hardest to wipe away. The streaks still remained even after cleaning mirror.


All in all I’d use soap, for a temporary quick fix, because many people already have it on hand.  Buy the spray if you don’t mind spending money.  Shaving cream is the last option if that’s all you have on hand.
A big thank you to my dear daughter for helping me with this test!
Check out our related YouTube video:


We are an affiliate of, which means we received a small commission if you click through one of our Amazon links when you shop, at totally no cost to you. This helps keep the lights on at the blog. Thanks!

Title Image by ivabalk from Pixabay

Spread the love