How To Keep Glasses From Fogging Up With A Face Mask
Glasses mist up when wearing a face mask as the mask directs the air breathed out upwards, where it comes into contact with the lenses of the glasses. The warm water vapor content condenses on the cooler surface of the lens, forming tiny droplets.
Here are some steps you can take to prevent your glasses from fogging up:
Washing Glasses with Soapy Water
The report published in the Annals of the Royal College of Surgeons of England suggested washing glasses with soapy water to prevent them from getting foggy. According to the report: "Immediately before wearing a face mask, wash the spectacles with soapy water and shake off the excess.
"Then, let the spectacles air dry or gently dry off the lenses with a soft tissue before putting them back on. Now the spectacle lenses should not mist up when the face mask is worn."
The report explains that the soapy water leaves behind a thin surfactant film that reduces surface tension, causing the water molecules to spread evenly into a transparent layer.
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