Behold my Dusty Swiffer
I put it atop a piece of paper and traced around the edges to create a pattern.
Get your dusting cloth
Cut it to your pattern, I left a quarter inch seam allowance, although I did not use a fold over seam. I serged the edges, and then I used Fold over Elastic to make the cloth gather around the rectangle of the swiffer. You could do the same thing with regular elastic. Pull it taught as you sew it down and it will gather the fabric as you go…