Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to clean onyx [title] Wipe the surface with a soft, damp cloth and mild soap. [step] Regular household cleaners are often acidic and can damage onyx. Milder soaps are ideal, such as dish detergent or soaps labeled " green, " which are usually ph-neutral.

Ending1: Dish soap is more harsh, preventing bacteria from growing. [substeps] Avoid using soap or other soaps with the capability to remove dirt from pebbles, like salt. Ending2: [title] Apply a disinfectant to remove stains. [step] A basic disinfectant is a soft, absorbent aerosol--like a regular dish cleanser. Ending3: [title] Use a soft-bristled brush to remove crusted-on spills. [step] Harsh scrubbers can scratch onyx, so it's better to use a cleaning brush. Ending4: [substeps] Avoid using abrasive cleaners, as they can leave scratching marks on your onyx. [title] Clean clean and dry the sterling silver with a soft cloth.

Answer format: ending1/ending2/ending3/ending4