What should be done about my wife’s recurring nightmares that involve seeing jinn in the form of smoke or shadows, experiencing intercourse in the dream, and the appearance of snakes, especially since we experienced symptoms of possession at the beginning of our marriage and it is suspected to be an 'aqis jinn (jinn of love)? Is it advisable to place a cloth wiped with red musk on the vaginal area, put salt in the corners of the house and in front of it, and recite verses over water for bathing and drinking?

We advise the wife to frequently engage in the remembrance of Allah and to observe the remembrances before sleep, especially reciting Ayatul-Kursi. If she experiences the disliked visions again, she should seek refuge with Allah from them and not speak of them to anyone, for they will not harm her.

There is no demonic possession, and the dominion of jinn is not to be asserted except with strong evidence. Ruqyah (incantations), ta'awwudhat (seeking refuge), and the remembrance of Allah are beneficial in removing such things. She should frequently remember Allah, recite the Quran, especially Surah Al-Baqarah. There is no harm in reciting the Quran over water, drinking it, and bathing with it. As for what you mentioned other than reciting the Quran, we know of no basis for it.