Cleaning and preserve your sunglasses properly will keep it in good condition. There are several tips that you can refer to. 1. For most sunglasses, when you fold them together, go with the left side first, so that it will keep the frame in the original structure and avoid and deformation. 2. When you don't wear it, fold it together and put it into special box or bag with a piece of soft cloth covering it. Keep it away from sharp and hard object, and materials or electric. 3. When you are taking it off, use both of your hands to get the two legs, and take it off from the front. 4. When the sunglasses are dirty with dusts, grease, sweat or make-up, clean it with warm water and mild detergent. After cleaning, use a piece of soft cloth to absorb the water. Don't wipe it otherwise there will be trace on it. 5. Don't soak sunglasses in water for too long or expose it under sunshine for too long. 6. Due to the material of glasses, it is common that the frame deforms a little after a period of time. Go to the store and adjust it periodically.