Well I had a day off, and me and my friend felt like doing something stupid. I once heard that Jaco used to put his strings in boiling water to keep them clean. Well it sounded like fun, so I did it! Great results! I put my eight month old flatwounds in, and they're actually much cleaner! There was dirt (quite a large amount of it) on the bottom of the pot! Would Roundwounds rust if I put them in boiling water? Or does the type of material matter?