I, too, will be watching this topic as I have MANY batiks, and love working with them. If you haven't washed them before storing, possibly some silverfish got to them because they love the "sizing" that most fabrics have on them prior to our washing it out. And, yes, silverfish do seem to materialize when and where we have no idea how they get into plastic containers, etc. Perhaps some of their eggs are attached to or imbedded in the fabric at time of purchase!