What is the way to rid my daughter and her sisters of seeing jinn and the strange signs they witness? Does this indicate possession, sorcery, or that the house is haunted?

The existence of Jinn is a reality. The Jinn see humans, but humans do not see them in every instance. Jinn can assume various forms. It is not a prerequisite for someone who sees Jinn to be righteous, as among the Jinn there are the righteous, the disbelievers, and the wicked. The cunning of Satan is weak. Reciting Surah Al-Baqarah in the home expels devils. Unlawful images and musical instruments may attract devils to the home. The treatment for demonic possession (mass) is through Ruqyah Ash-Shar'iyyah (Islamic exorcism), by seeking refuge for children morning and evening, teaching them the prescribed remembrance (dhikr), and seeking assistance from exorcists known for their adherence to the Sunnah.