I have been reading here on the forums that a lot of folks use a Neti pot.
This is good information:
Sharon said, "You can do this with salt water gargles in the throat, nasal washes in the nose (use either a neti pot or snort the salt water from your hand), or saline nasal sprays. Use 1/2 teaspoon of salt in one cup of water, 4 times per day.
sharon said, "When you need to get rid of nasal congestion short term, using Yarrow tea or tincture can do just the trick. A few drops of tincture under the tongue will start to clear up your nose and decrease the congestion in your tissues quickly. Yarrow can be used safely short term, but should not be used continuously over a long period of time. People use it orally and in the nasal passages. The tincture will irritate the nasal passages, so a tea is best for snorting it or spraying it in the nose.
https://permies.com/t/124976/kitchen/ve-Cold-favourite-remedy-tincture#996701
Sharon also explains how to use a neti pot in that same post.