The first tip here is to make sure you clean the glasses with a microfiber lens cloth. It is excellent for cleaning your sunglasses because it is actually designed to actually pick up and remove dirt and grease from the lenses. 2. Tip number two is to clean new glasses was some type of eyeglass lens cleaner. There are many different products like this that you can find either online or at your local optical or eyeglasses store, but whatever you do make sure that you read the instructions on the back. It should say it is safe to use with AR coatings that stands for anti-reflective coatings because some of these cleaners can be pretty harsh and can actually strip off that protective coating. To clean your sunglasses, just spray a couple of sprays on the front and back surface of the glasses and then again wipe clean with the microfiber cloth. 3. Tip number three is that when the spray cleaner and lens cloth just aren’t doing the trick because of skin oils that get on the lens, then make sure to reach for some type of dish soap. Just use a single drop on both sides of the lenses rub it in with your fingers and then go ahead and rinse off. 4. Tip number four is that when you’re rinsing the lenses, make sure you use warm water and not scalding hot water because the hot water can damage the coatings on the lenses. Also, if you know that you have hard water coming out of the tap, then make sure you use some distilled water to clean them off that way you won’t get any sort of like extra mineral deposits on the lenses. 5. Tip number five is that if you don’t want any streaks of water drying on those lenses, go ahead and grab a can of compressed air and use that to clean off all of the water off the lenses.