How can you get rid of post nasal drip that is causing bad breath? Natural remedies preferred?

bad breath
Joyce T asked:

I got a cold from a water park this August and ever since, i’ve had post nasal drip giving me very bad breath. Are there any things I can do to clear this up naturally? Will snorting saline solution do anything? Gargling with peroxide?
I have a tongue scraper and use it. it’s post nasal drip…my nose hasn’t fully cleared since I took the wave pool wave into my sinuses.

Rapid Cure for Bad Breath