For a better cleaning technique, we suggest using Thieves which you can find here. For a deep clean, use a spray bottle to thoroughly spray the undiluted formula in the oven's interior and leave overnight. You can follow up the next day by spraying it once more and remove all remaining residue with a clean, warm, and damp soft sponge. Wipe thoroughly with a kitchen towel/paper towel and use a magic eraser for the stainless steel part only and be sure to avoid the back side of the oven.
The glass panel in the front is easily removable and can be cleaned in your sink with normal dish soap. Please note that this is not dishwasher safe, and you should not submerge the glass panel in water.