For Swiffer dusters, which I really like. Simply swish the dirty duster in a sinkful of sudsy, warm water, rinse, and roll in a paper towel to blot out excess moisture. Reattach to handle, fluff, and allow to air dry. These are expensive refills to buy and you can use each one many times this way!
Again, another tip about how to re-use or re-invent the pads that are used for Swiffer mops. My questions is, are Swiffers really that great when any old thing will work in place of the manufacturer's pads? I've seen tips for using old nylons, old rags or towels, dryer sheets, you name it. Try an old-fashioned dust mop if you want to save some money! No replacement parts necessary!