laws of a ma'zoor

Q: If I experience pre-seminal leakage that is apparent in every salah time am I excused or not? I cannot feel it come out but I know it will be there in every salah time although it isn't constantly flowing. It causes me great difficulty having to check everytime if something has come out... because I may be reading salah or Quran and fear that my wudu has broken but I wouldn't even feel it. If someone were excused do they need to wash the private area everytime and does the cloth covering the private part need to be changed everytime?

Q: I have digestive problems, one of them problem is if I don't empty my stomach, I get a lot of wind coming out. Now this created difficulty because wind can break the wudu. I was told if it constantly happens, then your wudhu wouldn't break so it that true? My problem is sometimes I get a lot of wind coming out, sometime I don't. I have illness in my stomach so am I excused person when wind breaks out my wudu wouldn't break?

Q: I heard that for a (mazoor) with continuous drops of urine while in salaah, must renew ablution for all salaah. What if that person stayed at the mosque after Maghrib till Isha because of a lecture, will he have to renew it? If yes, must he make another istinjaa?

Q: If someone can't keep his wudhu for a long time during tawaaf because he is suffering from flatulence, what should he do if his wudhu breaks from time to time?