Sunglasses must be kept in their case at a temperature between -10°C and +35°C. Avoid exposure to the sun in closed environments without conditioning (for example on the car dashboard) because the temperatures reached in those conditions can damage the functionality of the glasses. If the sun filters become worn (for example, scratched, opaque) it is recommended to replace them with authentic spare parts.
Always carry your sunglasses in a sturdy case when you're not wearing them. To keep them in shape, use both hands to take them off and never put them face down onto a surface – scratches can be very annoying, or ruin your lenses. It's best to avoid wearing them on your head as it can distort the shape.
Keeping your sunglasses clean will ensure they look great and perform well. Sunglasses and especially their lenses require careful treatment. Improper care can damage lenses, resulting in scratches or haziness, which in turn may cause eyestrain.
The preferred method to clean your sunglasses is by gently rubbing them with a lens cleaning cloth and a liquid cleaner specifically designed for optical/sunglass lenses.
To minimise avoid damage, never clean your sunglasses with paper towels or clothing, which can grind dust and fibers into lenses and eventually leave scratches on them. Please avoid using detergents and soaps, they are powerful enough to eventually disintegrate lens coatings. Glass and Window cleaners are highly corrosive and can damage your lenses quickly. They are not designed for use on the non-glass lens materials used in sunglasses.