There is always the exorcism prayer of Pope Leo XIII, the long version that laymen are admonished not to say, but rather to leave it to a priest. The Apostolate for Christian Action (Stephen Oraze of Fresno, CA, publisher of Divine Love) offered these back in the 1980s, but I've long since lost my copy and haven't been able to find another one.
I once offered this prayer at home (I am not a priest), when the diocesan bishop came to visit, at the moment that he was scheduled to appear, and just as he began to speak, fire alarms went off in the church. One of the worst bishops that the US Church has ever had, pure evil.