In the old days -- the really old days -- people washed their clothes by beating them on rocks. After a few millenia of that we moved on to metal racks, then spinning drums, then finally the front-loading Energy Star-rated washing machine. All of these techniques have always shared one thing in common, and that's water. But those days may be drawing to a close thanks to the prototype Airwash, a clothes cleaner that uses ionized air to clean your dirty rags.

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