How to make a Pandora bracelet shiny again?

Can you provide a step-by-step guide on how to restore the shine of a Pandora bracelet? Are there any specific cleaning agents or techniques that should be used to avoid damaging the delicate design and materials? Also, how often should one clean their Pandora bracelet to maintain its original luster? Additionally, are there any precautions that should be taken when storing the bracelet to prevent tarnishing or scratches? Lastly, are there any professional services available for a deeper clean or repair if necessary?