This is a very interesing and informative thread! I have used a sweeper dust cloth on my old one and it takes the threads out really well. Unfortunately it has a lot of cuts in it and I never tried to soak it. Bought new ones - 2 of the Omigrid that "hook" together and are the green self healing. They are new so still work and look great. Still think I will soak my old one for the heck of it. Thanks again for all of your ideas.