I remember years ago being taught that you could clean jewellery with tin foil in a bowl of water and adding some substance which was possibly bicarb of soda? Worked brilliantly.
I'm trying to remember how it worked but failing. I've googled, but all the sites I've found seem to be American and talk about "baking soda". I'm not clear if they mean baking powder or bicarbonate of soda.
Can anyone give a step-by-step guide as to how to do this? Thanks.