An even better, safer, cheaper alternative (bleach) is to put regular hydrogen peroxide 3% in a spray bottle and use it as a nasal spray. Hydrogen peroxide contains only water and an extra oxygen atom — which is what animal life thrives on, whereas chlorine is the most toxic and corrosive element one can be exposed to.
The human body also produces it in the lungs, digestive tract, and thyroid — which is the human interface with the environment — as the basis of the immune system.
It works great for clearing nasal congestion as well, although Dr. Fauci would greatly disapprove of this use and message because it would decimate the Allergy, Respiratory diseases he would like his patients to keep returning to him for life — and only getting worse, and buying increasingly expensive drugs.
So just use the peroxide in the spray bottle without adding water? Will have to try it.
Common 3% H2O2 contains phenol, sodium stannate, tetrasodium pyrophosphate, sodium citrate, or acetanilide as a stabilizer. Diluted food grade (35%) would be preferable to avoid additives.