Rub it on your dog
Listerine is an effective remedy against fleas. Just rub some of it into the hair of your dog, or mix it with a pet shampoo and water to get rid of the pests quickly.
Use it on your face
Dabbing some Listerine on your face will effectively reduce acne. The mouthwash solution works better than antibiotics and topical creams and has helped many people defeat acne and other skin problems.
Stick your toothbrush in it
Just as it can defeat bacteria in your mouth, Listerine can also defeat germs on your toothbrush. Fill your nightstand glass with some Listerine and stick your toothbrush in it for a couple of hours in order to destroy all bacteria.
Spray it on your screen
Spray some Listerine on your TV or pc screen and wipe with a soft cloth afterwards to get rid of smudges and unwanted gunk. The product will also leave a nice minty smell behind instead of the chemical smell left by window-cleaning products.