We generally recommend using a silver polishing cloth once a week to wipe the surface of your jewellery with gentle pressure to help prevent any tarnish and also to cleanse the metal of skin, perfume, food or other "outside" particles, taking care not to wipe any pearls that may be present. These polishing cloths are made of soft cotton and impregnated with a specific cleaning solution; Selvyt is a good brand that is used in-house. We would discourage using commercial liquid polish or “dips” on your jewellery, as these can sometimes be too abrasive and, when used too liberally, can also remove any deliberate oxidisation detail.
We would also recommend removing rings when washing your hands or moisturising and in particular when doing the washing up - washing up liquid is one of the only substances that can actually wear down diamonds over time so that they lose their lustre. Additionally, it is always advisable to avoid wearing jewellery when doing manual labour (such as gardening or home DIY), cleaning, doing exercise or playing sports.