To clean the stubborn stains that stick around on your oven top you can use simple baking soda. To do this, all you want to do is make a little bit of a paste. You will need to sprinkle some baking soda onto your oven top, then wet your sponge a little, then pick up some of the baking soda with the sponge and start scrubbing. You should be able to see the stains coming up as you scrub. Baking soda is a great cleaning tool and will be the cheapest cleaning supply that you can probably find. It's also completely environmentally friendly you don't have to worry about any toxics smells or about your children getting into it. You can use as much as you want and it will take some work getting it in there and getting the stains out. Just keep using the baking soda paste to scrub away your stains until you get them out.