My toddler quite likes brushing her teeth. The dentist has told me that I should be brushing them for her until she is quite a lot older, and I do every evening (letting her do them more herself in the mornings), but it always creates a massive tantrum as she wants to do it herself. She is ok at doing them, and enjoys it. Should I keep on battling to brush them for her or should I let her do it herself all the time?