[E. Pluribus Unum]

Squirt bottle into each nostril. The more the better.

Pretty much the same as using a Neti pot, but H2O2 instead of H2O.

https://www.webmd.com/allergies/neti-pots

[E. Pluribus Unum]

Actually, a Neti pot with dilute hydrogen peroxide is common.

I just don’t bother diluting it. I use 3% straight from the bottle.

http://www.youralternativedoctor.com/super-boost-your-neti-pot/