[chufucious]

Try mouth taping. I suggest 3m Micropore tape.

My nose gets clogged sometimes but when you force yourself to breathe through your nose, your body tries to accommodate and opens it up. It will feel weird in the first week but you'll get used to it.

I'd skip breathe right and go straight to tape! I tried breathe right but I was still mouth breathing.

I started with https://somnifix.com/products/mouth-strips-snoring-sleep-aid – they have a tiny cut in the tape that allows some airflow; but it got too costly and wasteful so I moved to 3M's Micropore.