The eye glasses' lenses are easy to be dirty, so it must be clean frequently. However, the different material of lenses should be used in different methods. 1. The glass one, this one you could use soft cloth or facial tissue to rub, even use toothpaste to wash, then absorb the water with cloth. 2. The resin lenses, you must wash it with water then softly absorb the water with cloth or dry in shade. Make sure not to strongly rub or it will be easy to scratch. If it's dirty with oil, the liquid detergent would be put to use. 3. Coating film glasses, this kind of lenses can not be touched by organic solvent or hard objects to protect the coating. This kind of glasses you can use liquid soap to clean, and absorb the water with fiber cloth. To the summary, the latter two kinds of glasses, you'd better not to adopt toothpaste just because the toothpaste has granule scrubs, and it's likely to damage your lenses.