This is a magic recipe! I am on a lot of medication and it doesn’t t take long before my silver jewellery becomes tarnished. So annoying! I tried your recipe after discarding a lot of others that did a part-cleaning job so I must admit I was a bit skeptical. To my delight everything I cleaned came out shining and sparkly. I’ve used it on gold, diamonds, emeralds, amethysts but would not use it on pearls.
You can’t use anything else instead of baking soda. None of the other ingredients are necessary either… It’s specifically the vinegar (acetic acid) and the baking soda (sodium bicarbonate) that react and cause the reaction and hence the bubbles. The water actually inactivates both significantly and the salt (sodium chloride) is totally inert in the presence of the acid and base. As a matter of fact, when you combine the acetic acid and sodium bicarb, you get water and salt. The foil also does nothing…you can use any dish.