Tahaarat

Q: From my understanding, the hair transplant treatment is permissible. After having it done, one is required not to let water touch the scalp for about 3 days. How then should one do masah?

Q: Is it necessary to rub the eyes when making wudhu?  If a little dirt is stuck in the corner of the eye, is wudhu accepted?

Q: If a person gets nightfall (wet dream) but does not perform ghusl that day and then the next night he gets nightfall again and now he performs ghusl… Is this ghusl enough for both nightfalls or will he need to perform ghusl twice?

Q: Will my wudhu or ghusal be accepted if I have instant henna/mendhi on my hands. If not, why?

Q: I am a mechanic and work with grease. Often the grease gets stuck to my hands and cannot be removed by any means and only comes out after many hours. How should I perform wudhu and perform salaah?

Q: I have some questions regarding laughing aloud (such that another person can here you) in salaah. I have seen multiple views and do not know which one is correct. 

1. Can you touch the Quraan afterwards (i.e. is it hadath or not)? 

2. For those who say it is for reprimanding the person, not hadath, according to them can you make tawaaf with that wudhu, or is tawaaf similar to salaah therefore tawaaf is invalid with that wudhu?

Q: If there is 20l of water and a person submerges their hand in the bucket, does the water became unsuitable for istinja and wudhu?

Q: Please assist in the scenario below: 

I went for a tooth extraction at 16H15 (Asr time sets in at 16H00 but I had not yet performed Asr). Just before Asr time ended I made Wudhu and prayed Asr with blood still coming out. The blood stopped during the time of Maghrib, so Maghrib Salah was no issue. 

My question is if I have to repeat Asr as I was not yet a Mazoor (as the bleeding was not found for a complete Salaah time) but I had to pray Asr with my mouth bleeding as time was running out.