I had stored my drawn out empty frames in my garage. I had some of the moth crystals (not sure the name but the ones beekeepers use) on them but apparently they evaporated and the moths got into them. I was so upset! Anyhow they did not destroy all the frames (I had two supers). I threw out the ones that were destroyed. Half of them looked OK though. Are they still safe to keep? I put the remaining ones in the freezer. I sure hope so! That was a big lesson learned.