Life Life Strategies How to Keep Your Glasses From Fogging Up While Wearing a Face Mask This science-backed trick is a throwback from 2011—but it's really coming in handy right now. By Maggie Seaver Maggie Seaver Maggie Seaver is the digital health and wellness editor at Real Simple, with seven years of experience writing lifestyle and wellness content. She spends her days writing and editing stories about sleep, mental health, fitness, preventive health, nutrition, personal development, relationships, healthy habits, and beyond. She loves demystifying complicated health topics, debunking wellness fads, and sharing practical, science-backed solutions for healthy living. Real Simple's Editorial Guidelines Published on April 24, 2020 Share Tweet Pin Email You know what’s not fun? Wearing a face mask to help slow the spread of COVID-19 like a responsible citizen, and then being rewarded with totally fogged-up glasses. Yes, we’d rather get foggy glasses than catch or spread this unprecedented virus—or go against CDC recommendations to wear a face covering in public—but it’s still a nuisance. In fact, medical professionals (and many others) have dealt with inconvenient, face-mask-induced spectacle condensation on the job for far longer than the rest of us have since trying to quell this pandemic. Sure, getting foggy glasses from your DIY bandana mask might make for a funny selfie, but imagine trying to navigate a hospital with vapor-obstructed glasses—as if life isn’t crazy enough for healthcare workers already. (By the way, here's how to support frontline workers without leaving your home.) That’s why, back in 2011, two scientists published a study in the Annals of The Royal College of Surgeons of England that illuminates a super simple, at-home hack for this very phenomenon, which “can be a nuisance and even incapacitate” medical staff. Anti-fogging spray products do exist, but this trick requires zero shopping and adds no risk of putting harsh chemicals near the sensitive eye area. Here’s how it works: Right before putting on a face mask to head to the grocery store, hit the pharmacy, or scrub in for surgery: “[W]ash 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.” 5 Little Habits for a More Sanitary Home How simple is that? But it’s scientifically sound, promise. As study authors Sheraz Shafi Malik and Shahbaz Shafi Malik explain, wearing a face mask directs warmer, exhaled breath upward (rather than outward, like normal) where your glasses sit. The warm water vapor condensing on the cooler surface of the lenses causes them to form tiny water droplets and get misty. “The droplets form because of the inherent surface tension between the water molecules.” The soapy water’s sneaky role, then, is to leave behind an undetectable surfactant film that reduces said surface tension and allows these water molecules “to spread evenly into a transparent layer.” The authors also note this unassuming trick, or “surfactant effect,” can be used in any day-to-day attempt to prevent fogged-up glass surfaces. The more you know! You've Probably Been Washing Your Hands Wrong—Here's the Right Way to Do It (and Avoid Getting Sick) Was this page helpful? Thanks for your feedback! Tell us why! Other Submit