To make a washable and reusable Swiffer duster you will need:
4 pieces of flannel 7" x 7"
4 pieces of flannel 4" x 7"
Pinking shears or scissors
Swiffer duster handle
Flannel is inexpensive to buy at a fabric store, but you also might want to consider recycling something that you already have around the house. Outgrown flannel pajamas would work well, as would any soft flannel receiving blankets. In Abby's post she said that she had tried some other fabrics, but prefers the flannel over microfiber or fleece.
Cut four pieces of flannel 7" x 7" and four pieces 4" x 7".
Now fold the smaller pieces to the other side and mark a casing for the other prong in the same way. Machine stitch along each of the marked lines to form a casing for the prongs.
The prongs will slip right into the casings.
Now trim about 1" off the edges of the top large square and the top small piece so that the layers are graduated. Turn the cloth over and trim the other side in the same way.
Then starting at the narrowest layer, clip the flannel into a row of "fringe" at about 1/2" intervals. Repeat for each layer, then turn the duster over and repeat on the opposite side. You'll want to wash and dry the duster to fluff it up before using it. I cut mine with pinking shears to avoid a lot of fraying, but you may want to trim a few threads after it is washed the first time.
So how well does a homemade Swiffer duster work? Here's the comparison of a used and an unused one. The flannel is soft and does a great job of picking up dust, and I'm glad to be living a little greener with one less thing to throw in the garbage.