I am concerned about my daughter's hygiene. What can I do?

As you point out in your question, choosing your battles is always important, be it with toddlers or adolescents or fledgling adults. Cleanliness is an area where I feel it is important to insist on some parameters. As she is not a hermit living in a cave on a deserted island, her lack of bathing affects others, her family, friends and classmates. Everyone has to put up with the normal body odors that accumulate each day – sweat, dirt, dead skin, hair and skin oils, etc. In addition, like it or not, the adults with whom she interacts will be put off by her lack of attention to normal hygiene, no matter how sweet a child she may be.

So, have a friendly chat about why bathing is important and then try to reach a compromise. You would like daily bathing, she would like monthly. A reasonable frequency is a shower every other day with shampoo. If she is on a sport team, she needs a shower on every practice and game day. In the summer she may need daily bathing unless she swims in a pool. You may need to work out a reward system – stars for adhering to the every other day shower without reminders or protests and then a bigger reward when she accumulates two weeks worth of stars.