It is best to clean and wash your sunglasses on a daily basis. Dish washing soap removes body oil on the lenses, nosepads, hinges and screws. Ever notice how your nosepads turn an ugly greenish hue? This is caused by chronic build up of body oil. Similarly body oil in the screws & hinges loosens them.

For step by step instructions on the best way to clean your sunglasses, click the link below!

How to best way to clean glasses or sunglasses. | eHow.com