This story reminds me of the dangers of metal grill brushes. Public service announcement, don't use a metal brush to clean your grill. The metal strands can breakoff and if they get lodged in your food and accidentally swallowed it causes serious health issues and surgeons have a very difficult time removing them. These brushes are actually outlawed in Canada but not in the USA.
Here is an article on why they are dangerous if you want to know more... https://www.cbsnews.com/news/grill-barbecue-metal-brush-dang...