Here are my crocheted "sponges" or Dish-clothes... Basically if I like a stitch, I just do a small square of it and go from there, or if it needs a little more oomph to it, I do a rectangle and then fold in half, stitch or slip stitch the edges closed (or leave one end open to put hand inside) and viola, your done!
The green one I just did the other day (told you my favorite color was pink!). And these little suckers will SCRUB! Without scratching - woot! Now if you clean off a counter or something you will need to follow with a towel to get up the excess water: that is an issue I have been mulling over. I may try to make one side the crocheted side and the other maybe from the washcloths or towels that have holes in them..... hmmmm.