If a room in your house is stinking, from burnt food or anything else, grab two cinnamon sticks from the pantry. Throw them in some water and boil it. You'll soon have your room smelling fresh, says redditor phunterqa.
As the original poster and several commenters note, this doesn't leave any smell in your house, not even that of the cinnamon. It works well to mask odours and since it's organic, can be used safely without any harmful side-effects that you might get from other chemical-based solutions.