Swiffer, a cleaning product used in more than 50 million households worldwide, has partnered with international recycling leader TerraCycle to make its Swiffer Sweeper, Duster and WetJet refills nationally recyclable.   Through the Swiffer Recycling Program, consumers can now send in Swiffer cleaning products to be recycled for free.   To take participate in the program sign up on the TerraCycle program page at terracycle.com/en-US/brigades/swiffer and mail in the accepted waste using a prepaid shipping label. Once collected, the waste is broken down, separated by material and the plastics are cleaned and melted into hard plastic that can be remolded to make new recycled products.