Impurities on clothing and furniture

Washing clothes in a bucket

Q: What is the correct procedure of washing clothes by hand to make them paak? Is it ok to do this:

First rinse out the bucket, then put the clothes in the bucket, and add detergent and clean water from the tap. And soak for a few mins. After take the clothes out one by one and rinse under the tap and squeeze out the water several times.

Urine drops during pregnancy

Q: During prenancy, due to extra pressure on the uterus, it is too difficult to move and urinate. This pressure causes some fluid to be discharged from time to time especially when you try to move or have urine pressure. For namaz and wudhu, do we have to wash the trouser again and again? I live in a joint family home and it looks very wierd and awkward. If a lady teaches in school, there might be no washroom to wash the trouser. I have only two dresses then I'll have to wash the trouser many times for offering salah or reciting Quran?  

Finding blood on one's clothing after slicing meat

Q: I work as a blockman in a butcher. Due to the work environment I always get blood on my clothes. If I see it, I rinse it before I read salaah. Sometimes I only see some blood spots after I had read my salaah.

1. If I see blood stains (from meat carcass) on my clothes after performing salaah, is my salaah accepted or should I repeat the salaah?

2. Is blood from the carcass paak or napaak?

3. Do I have to wash or change my clothes before performing salaah if it has blood stains on it?

Washing impure water and saliva of a dog from one's clothing

Q:

1. If a person feels splashes of water on the uncovered part of his body, like on his back while making istinjaa, that water is impure and napak. How do we clean that part of the body?

2. If a dog sneezed on my clothes but I am not sure if anything came on my clothes because the dog was some distance away. How do I clean my clothes and the things which I will use to wash my clothes, like the bucket, etc?

Repeating salaah if one finds impurity on one's clothing

Q:

1. If one finds any impurity, like a small amount of stool on his clothes, would the clothes be considered napak and would the prayers offered with such clothes need to be repeated?

2. What amount of a najasat renders a cloth napak and impermissible to pray with?

3. If I need to repeat the prayer, would only the Fardh and witr be repeated or also the sunnat and nafl?