Fr. Euteneuer the Exorcist exhorts:

Jesus exorcised the devil from our lives by the one and only force that has the power to separate man from the devil and cast him out: His own Precious Blood. One week before His death the Lord Himself solemnly proclaimed that He would apply His authority in this way:

Now has judgment come upon this world; now will this world's prince be driven out, and I - once I am lifted up from the earth - will draw all men to myself (Jn 12:31-32).

These are powerful words for sure but not to be taken as just the pious hopes of a man with a death sentence. Jesus was telling us that He would do for us what no other death or human act could accomplish. He would place an absolute barrier between us and the devil with a wall of Blood called the Crucifixion.

...On Good Friday we must re-learn the value of this Blood for our sad world! By this Sacrifice the devil has indeed been cast out and has no power over those who have entered into the new covenant won by Christ at the cost of His Blood. The devil will continue to carry out his warfare against God's people, but his work now has no lasting consequences for those who choose Christ. Those who are freed by the Blood of Christ are free indeed. For this reason the Church exhorts us to remain in communion of mind and heart with the Church, the one place where this Sacrifice is celebrated daily. It is the only assurance we have of total protection from evil.

The Blood of Christ is also our greatest weapon against the evil that afflicts those we love. Do you have a loved one that is pierced by an addiction? Call Christ's Blood down upon him daily. Pray that the shed Blood will penetrate all the demonic bonds on his soul and break their grip. Do you have a family member or friend mired in an immoral lifestyle? Immerse her in Christ's Blood and symbolically bring her in prayer to Calvary to stand with Mary at the only place in the world the devil will not go. In time you will see the immense fruitfulness of that Sacrifice. It has the power to exorcise the world and free all its inhabitants from evil.