First remove what can be removed from your shoes as the insoles or laces and place them in the sun. Lift the shoes tongues if they have. Then stuff the shoes with newspaper or pour baking soda into them outside overnight. Newspaper and baking soda will absorb the smell. If you’re a dog lover, borrow the odour remover from your four – legged friend and spray it inside the shoes. The enzymes and bacteria in this kind of product will eat away the source of the bad smell. However, there is another weird but simple method : put your shoes in the freezer. The freezing temperature will kill the odour – causing bacteria