How can you clean a silver necklace if you don't have silver cleaner?

Toothpaste

plain white toothpaste and a soft rag

I sell a lot of silver on Ebay. Jewelry, silverware, serving sets. Silver polish and dips tend to remove some of the metal. The foil method doesn't work that great and still leaves a grey film that still needs to be removed. I use white toothpaste (not gel)and a damp toothbrush. For large items I use a damp cloth. Also works on copper, brass, gold, porcelain, ceramics, sneakers, plastics, etc. For my sales I needed one product for cleaning everything.

For chains I lay them down on a towel. A dab of toothpaste on a damp toothbrush and gently brush in one direction holding the chain at on end. Then just rinse and wipe.

Try Toothpaste.......

Article has homemade cleaners at the bottom, and lots of good info... https://www.novica.com/blog/how-to-clean-and-care-for-sterling-silver-jewelry/

Tooth past

hot water, baking soda, and a flat layer of aluminum foil in the sink, and soak necklace for a while until it sparkles.

Clean with toothpaste.