Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to clean black hills gold [title] Mix dish soap and warm water in a large bowl. [step] Any commercially available dish detergent should work; you can simply use the soap that you wash your dishes with. Pour a small amount into a large kitchen bowl, and then fill the bowl with warm water.

Ending1: Press down on the bowl with a rubber mallet to stir. This will immediately foam up the water, making it easier to easily soak up what is left behind. Ending2: [title] Let the mixture sit for 30 minutes. [step] Soaking your dark hills silver objects will make it more iron-rich, while removing any dullness from your edge brown objects. Ending3: Let the bowl sit overnight to beat any remaining gunk and grime off the black hills gold. [substeps] After you have poured the water in, you should stir your cleaning solution in. Ending4: [substeps] Although hot water will not hurt the jewelry, it may burn your skin. Make sure that the water in the bowl is warm to the touch, but not painfully hot.

Answer format: ending1/ending2/ending3/ending4