The problem was that it attracted stains. First there was what looked like coffee down the front, and then when I tried to clear that up there was this:
I have no idea. I spent a lot of time considering what to do. I thought about ripping and reusing the yarn to make socks. I thought about just chucking the whole thing. But first I decided to try overdying it. A little bit of blue in the dye water should make a nice light green, right?
I'm pretty happy with how it came out. Basically a slightly muddy version of my favourite colour, and now it;s wearable again.