If the entire oven needs to be cleaned, sprinkle a good layer of baking soda over the bottom, then take a spray bottle and spray with mix of equal parts vinegar and water. (If you are just spot cleaning, make a paste of the ingredients in a bowl or cup and apply to the problem areas.) You're trying to achieve a paste-like consistency, so don't over apply the vinegar/water mix! Allow the solution to set until it begins to appear dry, then wipe the mess away. If burnt on food/splatters remain, reapply the solution and allow to set once again (you may have to do a little light scrubbing to fully remove stubborn stains). Once you're finished applying the baking soda & vinegar/water mix, then take a clean, damp towel and wipe away any remaining white residue. Voila! A clean oven with minimal scrubbing and no harsh fumes!