TexasGranny

Get one of those new Swiffer Duster 360's... then crochet a flat piece and just make the loops longer (add more chains before attaching). Skip the part about making the sock part. When you are finished sew the 2 long sides together with yarn and a whip stitch and slip it over the Duster handle.

I'm a knitter too but cannot figure out how to do this by knitting...sorry. Maybe by knitting a ruffle after picking up stitches on each base row. Sounds like too much work to me.

For those who don't crochet and want to make a reusable cover you might recycle old hosiery... cut pieces the length you need, sew or glue or staple to an old piece of towel cut to the right size except a little larger, make a casing and insert elastic so it will fit around the top of your Swiffer.