I gambled and lost in the Vegas knitting game! I keep my leftover partial balls of yarn in large zip-lock bags and I'm always careful to keep all of the 100% wool in a seperate bag from the super-wash - well almost always careful. The felted bag was not a pretty sight! Half felted and half not. But along the lines of making lemonade out of lemons - I'm going to cut off the felted part and cut it into embelishments for another bag.