[header] How to clean cubic zirconia [title] Mix warm water with mild dish detergent. [step] Abrasive cleaners can damage cubic zirconia. All you need is some mild dish detergent from your kitchen and a bit of warm water. 
The precise ratio of detergent and water for a routine cleaning does not have to be exact, but strive for about one part detergent to two parts water. [title] Scrub your cubic zirconia with a soft-bristled toothbrush.