Our Physiological Sea Water Sprayer Contains Salt.It Can Immediately Penetrate the Nasal Cavity, Clean Bacteria and Pathogens, Through the Nose, and Clean the Surrounding Nasal Cavity Environment.The Method of Use is Very Easy: Open the Anti-Dust Protective Barrier Spray, Tilt Your Head Slightly Backwards, Gently Press the Nozzle; Wipe the Nasal Secretions with a Tissue, Wipe the Nozzle with a Tissue, and Close with an Anti-Dust Hat.It Can Clean the Nasal Cavity in All Directions, Relieve Nasal Congestion and Other Symptoms, and Ease Nasal Discomfort.