Thanks to everyone for the great feedback on what to do to help with the moths. I've got a system of rotating freezing going on, and some moth traps, as well as Irish spring soap and lavender oil, and as soon as I get my hands on some cedar planks, I'll be adding that to the mix, too.
After the horror of finding all three of my cashmere sweaters chewed by moths, I wanted to set about finding a way to upcycle them somehow. I cruised my pinterest fashion upcycle board for ideas, and really fell in love with the idea of embroidering on sweaters- as seen here, here, and here. I used to love doing cross stitch when I was a kid, and still have loads of embroidery floss- so I got out my stash and started working on one of the sweaters (I'm starting on the least expensive sweaters first, work. Here is the progress so far:
I'm aiming for a sort of abstract/geometric kind of thing. I think it's actually working out! Which is good, because I needed a bit of cheering up. Guy and I were excavating Lila's closet, to see if there were moths in there, and we found my old beloved Turkish carpet chewed to bits, and teeming with larvae. The carpet was the only one I bought myself (in the Grand Bazaar, no less!) when living in Istanbul many years ago, and it was really expensive for me. Even though we weren't using it at the moment, I was utterly heartbroken when we unrolled it in the bathtub and saw how bad the damage was. It had to be thrown out. I cried, and then had some wine. It was the only thing to do, really.