Crocheted or knitted dish cloths. The last one I have (1 of 2 given to me by my ex's aunt) is almost falling apart. I am in process of making a new one now. They are made from Peaches and Crème. Not sure if it is cotton or worsted but they last forever. Here is a link to their site and all kinds of free patterns.
http://www.peachesandcreme.com/free-...tting-patterns