Here's what I learned: first, these scrubbies are nice and scratchy when you make them out of tulle netting. Go to a craft store and in the wedding accessories aisle, you'll find 6" wide ribbons of tulle netting on spools. Cut the ribbon lengthwise in half to create two 3" wide ribbons. No need to worry about getting the cut even close to center since it'll all be scrunched up into stitches. Seriously, even jagged ends where you got perilously close to one side when you weren't paying attention while cutting is something that is easily hidden when making your scrubbie. Once you've halved the entire length, tie the two ends together and wrap back onto the spool so it doesn't get tangled while working.
If you plan on making oodles and oodles of these little guys, you may want to purchase some scrubbie mesh material from Joann, but the fabric comes in 54" widths and may be a little too much to handle for such a small job. But it would definitely save you some serious cash!
HERE by Judith Prindle. Below is a variation of the same concept, but without the spiral.