Can you use foil on a George Foreman grill?

It's not bad at all. There are some great techniques for using foil directly on the grill grates. I use foil on the grates when I grill onions and peppers to keep them from falling between the grates.

What's great about using foil this way is when you are done you can crumple up the foil and using tongs rub it over the grates to clean them.