When I was living in southern California, I got to know many of the employees at the Normandie club in Gardena.

They have a special room upstairs maned by two girls on 8 hour shifts who only job was to clean cards. They also contract the cleaning of chips to these girls as well as to others in their off hours. (I believe they put them in a washing machine) and believe it or not, they come out looking great. I know they tried a professional service years ago but understand the cost was too high.

Just a point of information.