The caption reads: "Water, vinegar, lemon, baking powder or soda [in]to the oven tray'. She then says to turn on your oven's self-cleaning mode if it has one, otherwise turn on the 'top and bottom ...

baking soda, vinegar and dish soap. When combined, these three ingredients create a paste that can be used to safely clean the inside of your oven. Here are step-by-step instructions on how to do it.