Many eyeglass wearers prefer to use a special eyeglass cloth to clean their glasses. Such cloths, often referred to as microfiber cleansing cloths, are incredibly soft and easily remove the toughest dirt and stains from lenses without scratching them. They leave an impressive lint- and streak-free clean. Fortunately, the cloths themselves are also easy to clean, and, with proper care, they can survive anywhere from 200 to 500 washings without losing their effectiveness.
Wash the cloth in warm water with one to two drops of mild liquid dish soap or liquid laundry detergent. Both forms of soap will work equally well, so use whatever one you have on hand. Pay special attention to the temperature of the water. Warm is best because it will open the fibers of the cloth, causing them to let go of any dirt that has built up on the cloth.
Rinse the cloth well to remove any soap from it. If you do not rinse all of the soap out of the cloth, you run the risk of rubbing soap onto the lens of your glasses, which can cause scratches.
Use a washing machine, preferably on the gentle cycle, if you choose not to wash the cloth by hand. Do not use fabric softener. The chemicals in the softener will act like a wax and clog the fibers in the cloth, rendering it unable to pick up dirt from the lenses.
Put the cloth in the dryer on the low setting or air dry. The cloth will regain its softness.