D.K.
Is it due to allergies or dry air? Keep a humidifier in her room (has to be cleaned often to not allow it to grow mold) however saline drops are a life saver for us with the dry air. My son has a really dry nose too. I have put small dabs of vaseline on the inside of his nose when it has been bad but a humdifier, warm shower before bedtime and saline should do the trick. If it is due to allergies, I would talk to your Pediatrician.