Please help me to pray for my brother to overcome his porn addiction

My brother is 18 years old now, but I notice that he always watching porn. I tried my best to stop him from watching that unpleasant scene but he didn’t listen to me.
He even forgets to go to church. He change a lot when he started university.
What Should I do to my brother?
I know that it is not good for his health.

Please help me to pray for my brother to overcome his porn addiction.
I believe that God help him to be freed from that addiction.
Pray for him that God will give him the light and show him the right path.