You certainly can’t unless when you possess special spiritual or demonic spirit removal skills. Which is a very rare occurrence to be both a victim and a healer at the same time.
You see, for us demonic removal experts, the first item in our “toolbox” is a protection ritual. Done on ourselves, considering we usually deal with powerful demonic forces of all nature and magnitude. If they don’t find you prepared with serious defenses. They make you the number one target because you attack them in their territory and threaten their existence. Anyone who’s familiar with demonic possession and the immense power it poses can’t come near them ill-prepared.
In light of the above, you, an ordinary folk, without any spiritual defense. It is best you don’t attempt to exorcize demons because chances are they will only increase in number and depth/strength.
A sequence of events or measures are deployed to ensure that demonic possession on an individual is decisively defeated so as to make it a point that freedom for the victim is restored. These may include deployment of reversal spells done via incantations at the spiritual house, wearing of special attire such as anklets, bracelets, rings, ornaments, etc, saying of spiritual prayers, use of deities of purification to counter the demons, among other interventions that may be deemed necessary.
The bottom line is to establish the intensity and nature of the demonic forces so as to prescribe the right steps that will surely defeat them.
The last step is always me doing a protection ritual that creates a defense system that repels future demonic attacks.