Heres the deal. You can say Get out in Jesus' name. SOmetimes that isnt enough. Remember the story in the Bible where the church people tried to cast out a demon but they werent close enough to God to do it and the demons left them almost dead? It has to be covered in scripture. Out of all of my experiences, nothing works, even praying, as quickly and as effectively as quoting scripture, because it is pure truth! And demons must flee from that.
This reminded me of a vision I had back in may. This is what it was: There was a persons head looking down, I couldnt see their face. Darkness was surrounding all around the person and slowly started to put its hands around the persons head and started to slowly "take control" of the persons head. the demon was distgusting and its hands were all black and looked horrible. its hard to describe in detail without someboyd actually seeing what i saw. then the demon started to laugh and everything was dark for a little while. suddenly a piercing light shot through the darkness and went through the demons head, which immediately "exploded", and the person was submerged in light, on his/her knees, with light shining down on the person, lifting his/her hands and praising Jesus