Smoke Odor Exterminator Spray - 7 oz - Blue Serenity The Smoke Odor Exterminator Spray, 7 oz, Blue Serenity carries a vibrant hydrangea fragrance with undertones of fresh blueberry. This enzyme-formulated air-freshener spray works fast to get rid of unpleasant odours from cigarettes, pipes, cigars, pets to other household odours.