Years ago a friend told me that she loved her Swiffer, but she hated buying the refills. She began to save her used dryer sheets. They fit her Swiffer and the residual fabric softener held onto the dust from her hardwood floors.
Since I don't use dryer sheets I began to look for washable alternatives to the traditional Swiffer sheets. Recently I read about using the cheap chenille socks from the dollar store. They stretch to fit over the Swiffer head, grab the dust well and are machine washable. A great way to save money and environment!