Clean Your LensesRegularly
Lenses should ideally be cleaned with a microfiber cloth, says Alain Guglielmino, co-founder and creative director of Pacifico Optical. “Resist the urge to use your shirt, towels or other random fabrics—these can damage the lenses anti-reflective coating and may leave marks or scratches over time.” A lens-safe cleaner spray makes for quick removal of smudges and oils that accumulate on your glasses. But you can also wash your glasses with warm water and a drop of dishwashing liquid. Rub both sides of the lenses and don't forget the nose bridge and the rest of the frames. Rinse and dry using a lint-free cotton towel or a microfiber cloth.
Store ThemIn a Case
This tip comes from Steve Arbetman, an airline pilot that takes his eyewear so seriously, he now sells sunglasses built specifically for aviation and driving. He says while it might seem like a chore, a case is the easiest way to prevent them from getting sat on, scratched or overly dusty. “If you don't like carrying a hard case, at least put them in a microfiber pouch,” he says. “That will still protect your glasses and can double as a cleaning cloth.”
Avoid Resting Themon Your Head
It's a common spot, Guglielmino admits. But repeatedly putting them on top of your head can stretch the acetate nose bridge and weaken your frames. “This also dirties the lenses with oils from your head and hair,” he says. Which only makes more work for you. Instead, place them in your chest pocket or hang them on your collar.
Don’t Leave ThemIn the Car
The dashboard is detrimental to sunglasses. So is anywhere where extreme heat can damage your glasses. “That heat can actually cause the lens of your sunglasses to delaminate,” says Arbetman. The coatings on your lenses may actually degrade or your frames could warp in the direct sunlight, amplified by your windshield or windows.
Loose HingesCan be Tightened
“Hinges often become loose after a certain amount of use—regularly opening and closing your glasses,” says Guglielmino. “This is pretty normal and happens with all brands.” But it's an easy fix. You can use a small screw driver to simply tighten the hinges. If you have trouble doing so, take them to a local eyewear shop and they'll no doubt help you out—likely for free.
Be Carefulat the Beach
Of course, you'll be wearing your shades at the beach. But try not to drop your glasses in the sand. If you take them off, keep them on a towel or in your case. “The sand finds its way into small places and can scratch the lens coatings,” warns Guglielmino. The same goes for the ocean. Salt water can seriously damage your polarized lenses, deteriorate frames and rust the steel inside the glasses. So make sure to give them a quick cleaning and dry them off after getting them wet.