What is the treatment program that the wife's father can consistently follow to spiritually cleanse himself from his condition, which has been diagnosed as a mixture of the evil eye and recurrent magic, knowing that he is a righteous man, 77 years old?

Whether a person is afflicted by magic or the evil eye, it is Islamically permissible to go to a shaykh who adheres to the Sunnah, so he may perform Ruqyah on him with the Quran and the reported supplications, while being cautious of charlatans. It is better for a person to perform Ruqyah on himself, as the Prophet, peace and blessings be upon him, used to do that. The affliction of a believer is for the expiation of sins, the elevation of ranks, and the purification of believers, and it may also be a punishment for some sins. A person must be patient to attain the reward of the patient.