A wooden plank works great for me. I was using an onion as well once in a while. Or try both. Try searching "wooden grill scrapers" on Amazon for example. Or i

A wooden plank works great for me. I was using an onion as well once in a while. Or try both. Try searching "wooden grill scrapers" on Amazon for example. Or if you don't like Amazon there are some other sites that sell those. I got mine from Canada, made from cedar and in addition to scraping the grill adds a tiny bit of cedar aroma.