Care and Keeping of Your Glasses
Before discussing how to clean your glasses, we should look at a few basic tips on keeping your lenses from getting dirty. Dust and dirt on your lenses can hinder your vision and possibly scratch your lens if you aren't careful, so you want to keep your glasses as clean as possible.
When you are taking your glasses on and off, hold them carefully with both hands at the temples about midway down the sides. Don't grab them by the lenses, as this will get grease and oil on them. Grabbing them with both hands will also protect the adjustment to make sure your glasses fit properly. When you aren't wearing your glasses, make sure to keep them in their protective case. This will prevent dust and dirt from getting on them, and will also protect them from being damaged.
Cleaning Your Lenses
Before wiping them, you will want to make sure to rinse your glasses with warm water. Even using a soft cloth on dry lenses can grind dirt into the lens causing damage. The warm water will get rid of most of the dirt and grime and make it easier for the rest of it to come off. After rinsing, wipe your lenses with a clean cloth.
Avoid leaving your glasses in your car during extreme temperatures as this will expand and contract the lenses causing them to change size and come out of your frame easier.