My thing is to clean my teeth thoroughly once a day, in the morning, after using a prebrushing rinse. I use an electric toothbrush, use it mindfully, then use a tongue scraper, then floss. My thought is that it takes 24 hours for plaque to solidify, and if I treat it with a rinse first, perhaps 12 hours more, which I never give it.
I think brushing twice daily, thoroughly, is too much. That’s my own gut feeling.
I’ve recently realized, though, that a mouth rinse with baking soda at bedtime is not a bad idea. That reduces acid while I sleep. There’s no downside I can see. I add it to my nasal irrigation, throat cleansing device.
My two cents. I will remind you, though, that there seems to be a link between root canals and cancer: https://rootcausemovie.com/
I haven’t watched the movie–as I commented at the time, the ADA got it pulled from Netflix–but the gist of it sounds right to me. This is actually a decent link. It may be worth seven dollars. I’ll see how the week goes.
For me, though: zero root canals, few cavities. My dentist says whatever I’m doing, keep doing it. I’m there like clockwork every six months, and never anything to report.
Take care of your teeth. I think this is vastly more important than it might seem at first glance.