How do you brush your interdental spaces with the miswak? If you don't physically brush or floss them, how can they be clean? Do your dentists x-ray your teeth? It could help a bit if you eat sugar-free diet but unless you mechanically remove the plaque buildup you will sooner or later develop gum inflammation/ gingivitis and carries.

Of course, you could explicitly ask if your dental hygiene is spotless. In any profession where you need to be nice to customers people tend to say fewer bad things or put them euphemistically. Clarity can get lost.