I looked all over for a nasal sprayer without any luck. I then went to the Wall-Mart drug department and purchased a small bottle of Saline nasal spray. I took it home, opened it, and pried the spray tip loose with a knife and pulled it off. I dumped the saline solution and rinsed the bottle out. I then filled it about half full of 3.18% peroxide I'd mixed and replaced the spray tip. I covered the bottle with a piece of thin black plastic to keep the light from going through the plastic spray bottle. (As you know, light and heat affects the strength of hydrogen peroxide) I mixed the solution using 1 oz. 35% food grade hydrogen proxide with 11 oz. of disilled water. This has worked wonderfully well for me. Oh, I keep the extra protion of the solution I've mixed in the refrigerator until I need a refill.
Best of health to everyone. John