metal spine, and larger thicker temples made of plastic with the full variety of colors.
1) warm soapy water. hold the frames under a faucet of warm water. get your fingers soapy and gently rub the lenses and the frame. this will remove grease and dirt without scratching the lenses.
2) lens cleaner. you can use lens cleaner from a small spray bottle if it is more convenient, but we prefer the water method if at all possible.
3) gently dab dry. the biggest mistake people make is to rub too hard. rubbing hard, especially on a dry lens, is where most of the scratches come from. gently dab the cloth on the 