My teeth are in good health and I take good care of them, yet I always get this plaque buildup no matter what I try.
I’ve tried different brushes, toothpastes, and flossing methods to no avail. Mouthwash is too harsh on my mouth and peels my skin off so I avoid that.
I haven’t tried waterpicks or electric brushes yet. Did you? Did they work for you? Have you succeeded in preventing plaque and if so, how???
Electric brushes usually help with that. Do go for a brand like Braun or Philips though, otherwise it’s easy to end up with a toothbrush with non-existent or low-quality replacement heads. You don’t need an expensive model from those brands. Those work about as well as the cheaper models and only include more frills, and their replacement heads are often more expensive too. The only feature I actually find helpful is the 30-second/2-minute timer which most models have nowadays.
Also you don’t need to buy multiple electric brushes, the replacement heads often if not always comes with colored rings you can put on. You can just have a different head for each person that you swap when needed.
I buy a new pack and replace all the heads every season.