Fine jewellery can be professionally cleaned up to once a year.
It can be cleaned at home regularly with a non abrasive brush such as a soft toothbrush with mild soap and lukewarm water to maintain the shine. However, it should not be soaked in water for longer than necessary.
Examine your jewellery regularly to make sure settings, clasps and joins are secure to avoid losing stones.
Jewellery storage is important as well. It should be stored in a cool dry no abrasive environment (preferably a cushioned/ padded jewellery box).