Last night I took out my fly tying materials to tie a few flies. It has been months since I pulled everything out. I was tying using a Pheasant Tail clump I bought years ago. I noticed at the bottom clump a whitish moist-ish powerdery substance. I had stored this feather in an unsealed bag. I didn't see any other signs of bugs. What happened to my material? I am suspecting that made the material was not fully dried and there has been some mositure instrusion? Comments please.