Is the silverware plated or solid silver? You can try white toothpaste first. But here are some other tips and tricks for cleaning silver: https://www.rd.com/home/cleaning-organizing/how-to-clean-silver/
I sell a lot of silver on Ebay. Jewelry, silverware, serving sets. Silver polish like Wrights and dips like TarnX 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.
This is the most effective and all-natural silver cleaning and polishing method that we use. It's also been featured by Hometalk. Hope this helps! Hugs, Holly
PS - We have a FREE eBook with recipes for all of my homemade and all-natural cleaners. You can download it here --> https://pinkfortitude.com/thank#GreenClean