Impurities on clothing and furniture

Q: I was away on holiday and some of my clothes got napaak, once the clothes were dry I packed it in a plastic bag and then in my luggage. When I arrived home and unpacked my bag I noticed that most of my clothes were damp, the outside of the plastic bag didn't however seem to be wet (but I can't be 100% sure as it isn't easy to tell). I am not sure what happened at the airline that may have caused the clothes to get damp. My question is whether this makes my bags napaak and everything else that was in it

Q:

1. If we wash napaak cloths in a bucket, will the bucket get napaak? Do all the cloths which we wash afterwards will be napaak?

2. How to make a the bucket paak. I usually pour water inside and outside of bucket using hand shower three times. Is emptying it out after every refill is necessary? 

Q: Could you please let me know if it's permissible to only remove a period stain from a bedsheet with the help of wet tissues before completely washing it in the washing machine or getting it washed from a laundry shop? Will it make the washing machine and other clothes in it najis? It's extremely difficult to wash a king size bedsheet by hand.

Q: With regards to an impurity that cannot be seen, is it sufficient that the impure object (e.g. cloth, fabric) is washed and dryed once, or must it be washed and dried three times?

Q: If I get some impurity on my clothes then I don't wash it according Islamic law i.e. the cloth is washed 3 times and squeezed with full strength the last time. Instead  I wash it until I feel it is clean. I find it more easier and better than the Islamic way. Is this kufr? 

Q:

1. I feel that when I am performing istanja, water gets splashed on my feet after touching my private parts. What is the ruling about these splashes?

2. Secondly I want to ask about how to clean slippers? If I am taking a bath and my body is najis, then how do I make sure that my slippers are clean after cleaning my body. I suffer from doubts about the inner side of the slippers that it becomes najis if najis water falls on my feet or slippers.

3. Last question is about washing shoes and other things which cannot be squeezed three times after pouring water on them? How do we make them paak if they happen to get najis??

Q: If I place my paak dry clothes in a bucket which was najis a month ago but is dried now. Can I use those clothes or they become najis as well? Theres no visible najasah in the bucket. It became najis because I touched it with najis hands and put najis clothes a month ago.

Q: I am potty training my toddler and during this time if any impurity touches my clothes what should I do?Do I have to wash them every now and then? 

Q: I have read that in order for najasat to transfer from one place to another, flowing wetness needs to be transferred. Now if my hands are not paak but dry, and I hold a cloth in my hand, does it become napaak?? The point where I am confused is that a hand is always sweating and in bright light very tiny droplets of sweat are always visible. Now if in such a scenario, if I touch a cloth, given my hands are not paak but apparently dry and I cannot see any wetness transferred to the cloth, does the cloth remain paak? Does this situation correlate with the ruling that a najsat with size less than a dirham coin could be ignored?

Q: If a little kid urinates in a bucket, how to get rid of impurity from the bucket?