First off I must say that I ASSUME I cleaned them. If they were like what you see when I got them, I wouldn't have cleaned them.

Having said that, EC chips, for the most part, are all in great shape. Soap on a tooth brush or even a scouring sponge with soap will make them look as new. Any dullness in color is brought back to their former brillance with a touch of baby gel, rubbed in, let to set in for an hour or so and then rubbed off with paper towel.