I have asthma and I use food grade hydrogen peroxide in my nebulizer.
It clears out my lungs better than anything else.
I also breathe it into my sinuses and it clears that out, too.
It will burn, especially when you first use it.
I only need a small amount and only use it for five to ten minutes. At first you’ll probably only be able to breathe it for about two minutes.
That’s not the brown bottle hydrogen peroxide.
Food grade.