. If you wear glasses, you may have noticed that covering your face is causing your lenses to fog up. We’ve gotten to the bottom of why that happens and how you can wear your face mask or covering so that it won’t happen.The science behind why our glasses fog when we wear a mask is fairly simple. As we wear our masks, warm breath escapes from the top of the mask and lands on the cooler lenses of our glasses. When that happens, it creates condensation, or fog.
showed that washing glasses with soapy water and letting them air dry can help prevent fogginess. That’s because the soap acts as a surface active agent, or surfactant, and leaves behind a thin film that helps prevents fog.“There isn’t any really good data and there aren’t any really good studies on these techniques,” says Dr. Brinton, “but any substance that will leave a surfactant on there that will impede the condensation can be useful.
He says that while substances like shaving cream, soap, baby shampoo, and toothpaste can all accomplish this, they aren’t widely used—mostly likely because they don’t last too long and aren’t as effective as other methods.Juliana LaBianca is the SEO editor at Goodhousekeeping.com, where she covers everything from holiday and home to travel and food; previously, she was an editor at Best Life and Reader's Digest.
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