I didn’t brush my teeth as a child and teen because I had energy issues and I struggled to actually do them; I still struggle to do it today.
I rarely floss because it seems like a lot of work for seemingly little gains.
I got plaque again after getting teeth cleaned some weeks ago. I guess my teeth is screwed…
Recently my dentist advised i get some special high floride toothpaste ($25 for 2 tubes from the dental office), which i am supposed to use once a day and leave on my teeth (spitting out the excess) instead of rinsing. I’m told the floride will be absorbed into the outer layer of my teeth, making it more resistant to bacteria. Maybe you could look into something like that.