Keep Swim Goggles and Eye Glasses from Fogging Up
Coat the lens with Colgate toothpaste and polish off. You can also use this method for keeping windshields fog free, bathroom mirrors or any other type of glass or mirror. Or a trick all of us who are scuba divers know: Your saliva will keep lenses from getting foggy. Just spit on the lens (yuck I know!), rub it around and give it a quick rinse in water. Saliva is an excellent natural defogger.