Chain as long as you want the dish cloth to be. I like to do about 25-30. Then crochet whatever size you want, whether it be sc, dc, or hdc. along each space. Chain appropriately and turn and go again. To get the nice ridge affect just poke hook into the back loop only. I made this years ago when I first learning to crochet. I did it by accident, but liked the way it turned out, so I kept doing it!