First, take a bowl and pour in 2 tablespoons of baking soda, a small cup of white vinegar, and the juice of half a lemon. Next, mix and dip the sponge into this fantastic natural mixture that you have created. Finally, run the sponge through the dirty, embedded racks of the oven.

You’ll notice that they shine again from the first pass. Of course, if you’re not satisfied with the result, repeat the process several times. You won’t have to spend all that money on the usual chemicals anymore, but you can take advantage of this simple method.