For nose breathing, myofunctional therapy fixed it for me: https://news.ycombinator.com/item?id=25911557 https://news.ycombinator.com/item?id=25911557 It wasn

For nose breathing, myofunctional therapy fixed it for me: https://news.ycombinator.com/item?id=25911557 https://news.ycombinator.com/item?id=25911557 It wasn't cheap, but it only took a few weeks, after years of no results! I tried Breathe Right strips and many more things. The problem is that everyone is a snowflake, so you have to try a bunch of different things. It was a brand new feeling being able to exercise with my mouth closed, and now sleep with my mouth closed. For others who aren't sure about it, try holding a popsicle stick between your sealed lips and do stuff around the nose. If you feel out of breath and want to drop the stick, then you're a mouth breather.