Hi Jules, I have quite a few piercings, mainly ear piercings. Once a week I take them out, boil a kettle of water add a touch of salt to the water and just leave them for a few minutes, rinse them and put them back in. I'm not sure if you can do the same with Silver jewellery, but I'm sure soaking them in boiling water wouldn't do them any harm, it would also sterilise them aswell. I wouldn't have a problem wearing secondhand jewellery, like you even if they came from a family member I would still sterilise them.