Here are some tips on how to care for your glasses to keep them functioning as well as possible and to extend their lives.

Cleaning:

Rinse your glasses with lukewarm water (not hot water) before cleaning. Because tiny particles can be abrasive when rubbed across the lens.

Clean lenses by using a lens spray or mild soap or a little dishwashing liquid, then rinse with water. Window detergent is not recommended as it may damage the lens's coatings. Polycarbonate lenses are not resistant to chemicals such as acetone or methylated spirit. If your glasses are fitted with polycarbonate lenses, you should never use cleaning liquid that contains Acetone or methylated spirits to clean the lenses. Always use a clean soft cloth to wipe the lens after rinsing or cleaning. Do not use worn clothing that may have embedded dirt or paper products to clean your spectacles as this can scratch your lenses.

Rainwater can damage the lens coatings. Remember to rinse the glasses or sunglasses with clean water then dry thoroughly before storage. To avoid damage to the coatings, never leave the glasses or sunglasses soaked in water for long period of time.

Wearing and Handling:

Do not wear your glasses on top of your head, as this can weaken or crack the frames. Also it could affect the optical alignment of your spectacles resulting in impaired vision.

Take them off with two hands instead of one. This keeps the earpieces straight and in the right alignment.

Do not left glasses hung on the neck via a spectacle cord. While attaching a spectacle cord on the arms of the glasses can prevent glasses from falling to the ground in case of accident, glasses should not be left hung on the neck via a spectacle cord when the glasses are not in use. This is because that the lenses are subject to frequent impact and scratch when the glasses swing and hit the surrounding objects.

Always lay your glasses with lens surface face up on a steady surface to avoid scratch or inside a case when not in use.

Storage:
When you put your glasses down, always make sure that the lenses are facing upwards. This will help keep them scratch free and clear for years. Never place your glasses in your pocket or bag unprotected. Always store your spectacle in their protective case and away from excessive heat, for example, not to left on car dashboard, not to left in a car under the sun in hot days.