Summarize this article:

Monthly cleaning is needed to prevent the build-up of dirt and grime on cubic zirconia. If you're consistent with monthly cleaning, this reduces the likelihood the jewelry will build up dirt to the point professional cleaning is required. If you wear cubic zirconia on your hands, avoid using lotion or things like essential oils. Cubic zirconia is sensitive to such substances and can easily be damaged. If you do use lotion or oils, keep it away from any cubic zirconia you're wearing. Bleach, chlorine, and ammonia should not be used on cubic zirconia. Do not use any chemical cleaners to remove harsh stains, as this can easily damage your jewelry. Cubic zirconia should be stored in an airtight container to prevent wear and tear. Any time you're not wearing cubic zirconia, store it promptly and in a safe container.

Summary:
Clean cubic zirconia once a month. Keep cubic zirconia away from lotions and oils. Avoid harsh cleaners. Store your jewelry safely.