Proper care
Remove any dust from the lenses by rinsing the frames and lenses in cold water, blowing on the lenses, or lightly brushing the particles away. This will help prevent hairline scratches from forming, causing lens "fogging" over time.
Spray both sides of your lenses with a lens cleaning spray at least once daily. Use products that are alcohol-free or marked "safe for anti-reflective coatings."
Wipe your lenses with a soft, microfiber lens cloth until dry. You can use the cloth on dry lenses to quickly remove smudges during the day.
Store your glasses in a case when not in use. Keep your lenses facing up to prevent them from scratching, especially if you lay them on a table or counter. Hard cases provide extra protection from damage when keeping your glasses in a bag or purse.
Bad Habits
Never use your shirt to clean your lenses. The rough fabric, as well as any particles on your clothes, can scratch your lenses.
Do not use rubbing alcohol or household cleaners on your lenses. Alcohol can fog your lenses, and the effects cannot be reversed. Windex and other household chemicals can permanently damage anti-reflective coatings.
Avoid using one hand to put on and take off your glasses. This habit can lead to plastic frames stretching out, lenses popping out of semi-rimless frames, and stressed and weakened joints in rimless drill mount frames.
Never leave your glasses in the car, especially on hot days. Heat can cause plastic frames to stretch and can distort lenses.