Purely my thing based on having healthy teeth doing this all my life...

Normal brushing then mouthwash with that toothpaste after. This submerges teeth / washes your teeth and get to the places even flossing can't get (many more bits come out after 5 / mins of sitting in front of screen with mouth washing going on!)
If toothpaste protects teeth somewhat, penetrates somewhat and gets to hard to reach areas... BINGO - DON'T SPIT OUT... PLAY WITH IT A BIT MORE!

(what you have used after brushing do not spit out)

I think this beat flossing and those plastic things because eventually submerging, pushing with big pressure in cheeks is a delightful car wash for teeth... one day I'll add a picture but for now just letting a secret out there - call it dental hygiene or preservation :)
And don't ask what my record is for holding it I've broken in many times past the 10min mark! And doing it now while writing this :)
Yup not just a preacher. (hmm wonder if there is a teeth cleaning emoji !!)