I was a little skeptical of this advice, so I did some online searching. There are a bunch of articles with anecdotes about this working, but here's an article

I was a little skeptical of this advice, so I did some online searching. There are a bunch of articles with anecdotes about this working, but here's an article that seems to have a bit more substance about this method: https://www.tastingtable.com/cook/national/how-to-clean-a-grill-onion-easy-grilling-tips https://www.tastingtable.com/cook/national/how-to-clean-a-gr...