Impurities

Q: If I found some mazi drops on my underwear after Salaah and don't remember exactly when it came out. Is my prayer valid?

Q: In ghusl, if I do not not wash my feet and feet's sole and it gets wet by water which I used for ghusl on other parts of the body and with my unwashed wet feet I roam in my house, is my floor or clothes impure and can I pray on my floor and with these clothes? Because I wore my pants when my feet unwashed but wet which transferred wetness to my pants probably impure water. And In fajr I am unable to find enough time to pray with purity because I have urine drops problem in fajr which may take 1 to 1 and half hours to get pure which I don't and cannot give can I be considered mazur for fajr time and can I pray in jamaat in this condition? Please suggest some zikr or Dua or salawat to get rid of waswasas (satanic whisperings) which have taken over my life now I miss two prayers on average daily because of it.

Q:

1. If I see a wet dream and I am wearing a pad, does it make the bed sheet najis if there are no signs of impurity on it? Should I change the bedsheet

2. I keep my scarf for prayer on the same bed. Has it become najis?

3. If I put clean wet or dry clothes on the same bedsheet, will they become impure?

Q: Is it halaal to own leather products like wallet/phone pouch made from crocodile/alligator/snake skin?

Q: Please can you advise if a bed sheet with stains (possibly not najis, possibly sweat or drooling saliva) has been washed in the washing machine with other stuff but the stain has not been removed fully then is the sheet as well as other stuff rendered impure even after 5 rinses and spins or is it paak. Also is raw fleshy skin due to a burn peeling off on the arm considered pure?

Q: To become paak, what should one do if a dog touches their clothes, what should one do if a dog touches their body (e.g. Foot)?

Q: My mattress got soiled by urine twice. I tried purifying it by pouring less than a kurr water over the places. Can it be considered paak?

Q: We have wall to wall carpets on each room's floor in our house. If it gets impure, how can one make it paak? It is not possible to pick it up and let water flow through it. I take a dry towel. Pour water over the impurity and rub it dry with the towel. I repeat it three times. Does it make the carpet pure?

Q: When killing a spider or an insect or the like, is it's blood considered impure?

Q: I read somewhere that if one had masturbated, their sweat is napaak. If someone touched their phone and their hand started to sweat, is it napaak if they had masturbated? What would be the correct way to make it paak?