interestingly enough, Fr. Gabriel Amorth, in his books An Exorcist Tells His Story and the sequel to it, he actually does address this topic. Fr. Amorth, a Vatican Exorcist, tells stories of clothing not being possessed but of there being demonic influences attached to material items.
Furthermore, only a licensed priest with the permission of his bishop or a bishop may perform a formal exorcism.
However, the laity are encouraged to pray two particular prayers of deliverance. The
Anima Christi and the Prayer to St. Michael are prayers of deliverance that have particular graces attached to them.
Furthermore, a lay person should not try to ascertain presence of a demonic influence. That is best left to a trained priest with the assistance of trained professionals who deal with psychology, parapsychology, psychiatric medicine and other forms of counseling.