Earring care and maintenance for your custom earrings is very similar to how you care for jewellery without any personalisation. For jewellery made from gold, silver, and other hardier materials, you can soak the earrings in warm water and gentle dish soap before using a soft cloth to rub away any dirt or grime gently. For costume jewellery, it is best to avoid prolonged exposure to water, so a damp cloth is best.
If your jewellery has intricate settings, then using a soft toothbrush can help to reach complex areas. You might also consider professional cleaning if your piece is very special or you're concerned about damage.