Being possessed by a jin

Q: I have a question about jinn possession. Someone in my family is, I think possessed by a jinn. He has be showing the symptoms of jinn possession and I don't know what to do. I am his younger brother 16 years old and he is in his late 20s. He doesn't listen to dad and has arguments with him about Qur'an and Allah Ta'ala. Now he usually just stays in his room all day, sleeps, doesn't go to work, stares at things for periods at a time, and has bad mood swings. Please if there is any advice on what to do.

Wet dream

Q: When at night we see a wet dream and we ejaculate, is it farz to do gusl afterwards? In winters it is difficult to take bath at fajr and then go to masjid. If after ejaculation we don't do gusl can we offer salaah with just wudhu?

Washing impure clothes in the washing machine

Q:

1) If after washing impure clothes in a washing machine which takes just under 1 and a half hours but a couple of items of clothing still have washing powder residue/white marks on them then are all the clothes rendered pure or would I have to wash them all over again? The cycle has 5 rinse and spins.

2) Also please can you clarify the hanafi madhab regarding tiny impurity. When I use the toilet no matter how hard I try to safeguard myself from urine/toilet water splashes, it seems like very tiny dots of urine are splashing on my under thighs, possible 1 or 2 tiny splash and it is very difficult to wash the area in the toilet itself so this resorts in having a shower waist down every time and takes so much time. Because they are tiny, can they be classed as paak?

3) When having ghusl in shower and the private parts are washed with water and after I use soap on the area to wash it then can I simply wash it off with the shower head without using my hand? Will my ghusl be complete?