2 Corinthians 10:4 -- "the weapons we use in our fight are not the world's weapons, but God's powerful weapons with which to destroy strongholds."
We deal with the devil by dealing with the carnal thought systems, the strongholds, that protect the enemy. The pulling down of strongholds begins with repentance.
The energies we expend in keeping our sins secret are the actual "materials" of which a stronghold is made. The demon you are fighting is using your thoughts to protect his access to your life.
Identify one stronghold that you are using to protect the government of satan in your life.
Write down two affirmations that will bind the enemy and loose the power of the Kingdom of Heaven over this stronghold.