I heard tale of cleaning silver jewelry with ketchup so I gave it a go this aft, as we are doing all the “three days before our wedding oh my god fiddley bits!” and it totally worked. Turns out the natural acid in tomatoes, with the aid of a toothbrush and soaking them 20 mins, is all you need.(thanxs fiancé for googling it). As I neared the end of the task I was “forced” to put my fingers deep into the ketchup bowl, just to make sure I hadn’t lost anything. Awesome.