In fact, I think you had better not clean your lenses with the windex. As we all know, there is a ingredient in the windex called the ammonia, which is very slightly acidic and can dissolve alkali metals, which is what your sunglasses lens coatings are made out of. Then some time later, the coating on the surface of your glasses will disappear and the result is that your sunglasses can protect your eyes from the sunshine. In other words, there is another product called situation and glasses cleaner, so I suggest you clean your sunglasses with the right thing, that's why the professor and experts created them. Now, maybe you will say that the situation and cleaner will cost you some money. Frankly, I think it will not cost you much money. Meanwhile, you can also have a try with the soap and warm water, which nearly cost you nothing.