I wash everything except charms, jelly rolls and precuts. I learned the hard way that they all shrink. I have tons of washed charms that I now cur down to 4 x 4 square to use so they aren't wasted. I can also still use them for Dresdan Plates. So, although they are not fit for 5 x 5's anymore, they are still quite useful. The jelly rolls are another story.