I go to the salvation army and buy a bag of tshirts and take them to my office to cut up for rags. they are the best rags you can't buy lol I use them for work, I use them in the office,at home and my husband uses them in the machine shed When the boys come home, they use them to clean their cars. Every once in a while a customer will notice them and ask where I got them. I use my rotary blade on quilting until it was dull dull dull and then finally after skipps would use it on the tshirts. Now-thanks to you gals and HF- I have all of the rotary blades I need. You are all great. Glad I stumbled upon this board!