As you know, I have been on a quest to use natural ingredients to clean. I am doing so primarily to save money (salt / vinegar / baking soda in bulk is much cheaper per ounce than cleaning supplies), but the whole "green" side and "its better for your family's health" aspect are nice perks.
I read an article a while back about using Kosher Salt as an abrasive cleaner. You can actually use a lemon dipped in salt to clean, but I didn't have a lemon handy, and NEEDED to get my French oven clean. I figured I had nothing to lose, I had just stocked up on two pounds of salt for 54 cents.
Rinse and smile!