You need to get rid of the moths/larvae/eggs before using the batting. Wool batting doesn't wash well, but wash anything it's been in contact with. I've read the freezer trick that mermaid mentioned works, though I haven't had to try it myself. I had moths in a coat closet once, and I washed all the coats that were washable and picked off the nits from all the ones that weren't. What a pain!