My ex bf did a poo in my jewellery box :( ..How can I get back at him?

We had just had an argument which ended with me saying that I wanted to break up with him. I then went to the bathroom and when I came back he was gone. It wasn't until later that I realised that the spiteful, disgusting bastard had defecated in my jewellery box and shaken it up. My whole collection was smothered in it. Now, even though it's been thoroughly cleaned with disinfectant (several times), I can't bring myself to wear any of it. :( Not only was my collection worth about £800 in total, but some of the pieces were of great sentimental value, so I can't bring myself to sell it either. Not only that, but I'd feel guilty about selling it to another woman knowing what's been on it. I really want to get back at him, to teach him a lesson and to make myself feel better, but I don't know what to do. Any ideas?

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