1. Gather your cleaning supplies: To clean onyx, you will need a soft cloth, mild dish soap, a bucket of warm water, and a soft bristle brush.

2. Protect the surrounding area: If you’re cleaning an onyx countertop or floor, ensure that adjacent surfaces and fixtures are protected with plastic sheeting or drop cloths.

3. Mix your cleaning solution: Combine a few drops of mild dish soap with warm water to create a gentle cleaning solution.

4. Test clean a small area: Before you begin cleaning the entire surface, test the cleaning solution on an inconspicuous area to ensure that it doesn’t harm the onyx.

5. Wipe down the surface: Using the soft cloth dipped in the soapy water, gently wipe down the surface of the onyx. Start from one end and work your way to the other end to prevent streaks.

6. Scrub gently with a soft brush: For stubborn stains or residue, use a soft bristle brush to gently scrub the surface in small circular motions. Be mindful not to scratch or damage the onyx while doing this.

7. Rinse with clean water: After applying and scrubbing with the soapy water solution, it’s important to rinse off any soap residue thoroughly. Use another clean cloth soaked in fresh warm water to wipe down and remove any leftover soap from your onyx surface.

8. Dry your onyx surface: Once you’ve thoroughly rinsed away any soap residue, use a clean, dry towel or microfiber cloth to buff dry your onyx surface – ensuring no moisture is left behind which could lead to staining or watermarks.

9. Avoid harsh chemicals and abrasives: Onyx is a delicate stone that can be easily damaged by acidic or abrasive cleaning products. Stick to mild detergents and gentle tools for best results when maintaining your onyx surfaces.

10. Seal your onyx: To prevent future stains and protect the surface, apply a stone sealer designed specifically for onyx every six months to one year. Always follow the sealer manufacturer’s instructions for application and drying time.

11. Polish the onyx: Utilize an appropriate non-abrasive polish to keep your onyx surface shiny and looking its best. Follow the manufacturer’s instructions for use and always test in a small, inconspicuous spot first.

By following these 11 steps, you’ll be able to preserve the natural beauty of your onyx while maintaining its cleanliness and durability for years to come.