Pure and Impure Items

Q: Is it permissible to tan elephant skin?

Q: If one's lips bled with some of the blood going into the saliva, and the person spat out three or more times, then is it permissible for him to swallow his saliva after that? 

Q: I have a watch which has a genuine leather strap. My question is whether it is permissible to wear such watches because we are not aware of whether the animal used for the leather is halaal and has been slaughtered in the halaal way.

Q: Dear respected Mufti Saab, I wanted to ask that if the dishwashing washing tablet contains glycerin along with alcohol (and other impure substances), are dishes that are washed impure. The machine does have a rinse cycle but then the 'rinse aid' that too if it contains glycerin along with alcohol or other impure ingredients, are dishes washed with it impure? According to the website , http://www.info-pg.com, dishwasher tablets and 'rinse aid' products do contain glycerin, alcohol ( not sure if all do but some products that I've checked do).

Q: Do hair and nails become impure once removed from the body?

Q:

1. I don't know if this is going to the extremes, but is it permissible to take an ear medication (through the ear) that contains glycerin which may or may not come from animal fat?

2. If that's the case, would that make soaps also impermissible?

Q: Is it permissible to use aagarbattie that contains cow dung?

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

Q: I am from India. Mufti sahab please let me know that can I use liquid stiffener (revive) in our clothes for praying namaz?

Q: Is it haraam to wear pigskin?