Impurities

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: Please can you help me with the following?

1. I was walking outside and there was an area which had a lot of stool from various birds, I tried my best to avoid it but am not certain if I avoided it completely, does this make the bottom of my shoes napaak?

2. If a non Muslim is eating a sandwich and I am not sure what the content of the sandwich is (i.e. if it contained something haram) and they subsequently touched me on my back, does this make my clothes and the seat my back subsequently leaned against napaak?

Q: Are any of the following regarded as impure in Shari'ah?

1. The mucus or phlegm that comes out of the nose or throat due to a cold, flu or sinus infection

2. The yellowish white mucus or phlegm that comes out of the nose or throat due to a cold, flu or sinus infection

3. The yellow or green colour mucus or phlegm that comes out of the nose or throat due to a cold, flu or sinus infection (could be pus).

Q: How to clean impurity from a mobile charger and wood?

Q: Will clean clothes become najis if najis if they are washed with najis clothes in a washing machine and then dried. My family members are praying in that clothes. What should I do now? 

Q: When urine gets on your clothes, how do you purify it?

Q: I wanted to ask that when doing istinja sometimes the water used whilst washing may go on the toilet seat, either at the back or the front of the toilet seat, these can be splashes to drops of water. Are these pure or impure? Also when tried to wash the seat because of this, the water used to wash it then goes on the floor so does this make the floor impure and is it enough to wipe the floor with a sponge? Please help as I don't want to make the bathroom najis.

Q: I know non flowing blood is pure but what if it is wet where the wound is and the blood/wetness goes on a towel or elsewhere you've touched? Does it make the towel or elsewhere najis? Or if I'm not sure if it did transfer anywhere then is it still pure?

Q: My dress got soiled with stool and while I was washing it, my dress touched my body/thighs before squeezing the water from my dress. Then I continued washing my dress and squeezed it which means my dress is clean now. But this wet dress touched my body/thighs which became naapaak first and I did not wash it because I wanted to wash my dress first. So now did my dress become naapak again? If yes, so how many times should have I washed it - one time or three times? What if I have washed it only once and wore again and sat, slept, etc. Do I need to purify all the things?