H2o2 for minor cold, or major cold

I have been well. I haven’t use h2o2 aka hydrogen peroxide internally, but I have been washing my teeth with it (I have put the 3% diluted food grade h2o2 into a small spray bottle, and I spray it in my mouth. Another way I used the same spray bottle is spraying a few puffs into my ear (while holding the head tilted) when I had a stuffy nose or a stuffy head… Works wonders, and I haven’t had a bad day since I started. And I live in cold snowy windy Syracuse!