Matthew 10:6-8 (KJV)
6 But go rather to the lost sheep of the house of Israel.
7 And as ye go, preach, saying, The kingdom of heaven is at hand.
8 Heal the sick, cleanse the lepers, raise the dead, cast out devils: freely ye have received, freely give.
Jesus gave HIs apostles, and believers, a command to cast out devils. God is in full control of the demonic realm and the demonic presences in our lives and bodies. But He has given us the command to tell the demonic presences what to do. What do "we" want? We can't ask God to have full control over the demonic, He already does. But He is waiting for us to speak the words of what needs to be done. Believers have been given the keys to the kingdom of heaven and to bring heaven to earth. In order to do that we do just like Jesus did when He was on this earth. Jesus did not ask the Father of bless a place, or to remove demons from a body, Jesus blessed the loaves and fishes, Jesus told the demons to leave. God is waiting for us to speak what we want done.
Here is a sample prayer to speak aloud each day.
In the name of Jesus, I bless my home and everybody and everything in it. I bless the land my home rests on and everything which rests on the land. I bless my place of business, the product of my business, the clients of my business, the money my business processes, and all the employees of the business. I bless my debts and declare them paid in full. Thank you Jesus.
In the name of Jesus, I bless you with the life of God.