To use Arm & Hammer Simply Saline spray, insert the tip of the nozzle into one nostril and gently press down on the textured area at the base of the nozzle. A gentle mist will coat your nasal passages, then blow your nose gently to clear excess mucus out. Repeat the same step for your other nostril, then clean the tip thoroughly and replace the protective cap. To flush and irrigate your nasal passages, tilt your head to the side over the sink while using the product.