Making wudhu in a place where impurity was washed
Q: I had an infection on my toe which I washed off (whatever was coming out of the infection) in the tub. A little later, while the tub was still wet, I was making wudu in the tub and some water splashed back to me when I washed my face. Was this water impure? Also, when I am filling up a jug to use to make istinja, I sometimes place my finger in the water to check how warm it is. Does this affect the ability of the water to purify?