Impurities

Q: Is it permissible to use pig dung as a fertilizer for soil to plant?

Q: If some impure drops fell on my mobile and I just cleaned it with something and it vanished from the screen or is it necessary to wash or wipe it with water?

Q: If someone touches impure clothes with wet hands, but after touching it there is no trace of the impurity on his hands, will his hands still be regarded as impure?

Q: Is washing soiled impure clothes with semen and such in 40°c water with 45 min wash in the machine sufficient to make them pure? Even if u may still see stains.

Q: Spiders don’t have blood in their circulatory system. They have something else called haemolymph. Is this impure because a few weeks ago I squashed a spider on my carpet in my bedroom, so does that mean this carpet is impure? I’ve also walked all over this carpet with wet feet after wudu sometimes.

Q: Can we wear and wash clothes made up of recycled plastic fiber in a washing machine with other clothes? Are these clothes pure to use as these days mostly clothes use recycled material.

Q: Please can you help me with the following:

When I flush the toilet, drops of water fall on the seat, does this make the seat napak? If something napaak falls on the toilet seat, I usually wipe the seat with a wet cloth then wipe it with a dry tissue. Sometimes my thigh gets a bit wet when I sit on the seat as the seat is not completely dry after I have dried it, will this make my thigh napaak? 

Q: I have a blister on my toe due to standing long periods at work with narrow shoes. Is the water in the blister najis? If it is, then what can I do if this blister pops uncontrollably in my sleep on my mattress or in my shoe?

Q: Is the moisture on the inside of the opening of the urine hole najis? Because this opening touched my underwear, like it unfolded and rubbed against my underwear on accident. No urine came out. It was just the urine hole but of-course this area is naturally wet so is it najis?

Q: Chinese Sumi ink is used in certain types of Arabic calligraphy. I have recently found out that this ink is made using gelatine/animal glue from cows or rabbits. As there is no way to determine whether the gelatine is from halal slaughtered animals, is it permissible to use this ink for writing? In particular writing the Names and Praises of Allah Ta'ala and Aayat of the Quraan Majeed?