The Ruling on Tayammum with Used Dust

The questioner: His next question says: Regarding tayammum according to the madhhab, we heard that it is not permissible with dust that has been used. What is the ruling for patients who perform tayammum with dust from a container multiple times? Is the prohibition due to it being disliked, or not?
The Shaykh: The meaning of those who said, "Do not perform tayammum with used dust or with used water that is not used for wudu," is the dust that falls from a person's hand, the dust that has fallen from the hand. As for the dust in the container, this is not called used; because the used dust is the dust that the hands have taken. As for the remaining water in the container, it is not used, and the remaining dust is not used. So there should be no issue with this. Yes. The dust in the plate or in ...... Yes, what is considered used is the dust that he took in his hands and then it fell off; this is the used dust.
The presenter: Meaning: the one that stuck to his hands?
The Shaykh: Stuck to his hands, yes, this is the used dust.
The presenter: Like the water...
The Shaykh: And likewise the water that stuck to the hands and dripped into another container, this is used. The well-known view among scholars is that it is not used, and some of them said: It is permissible to use it as well, even if it fell from the hands, if it is clean and has not been touched by impurity, then it is purifying. And some people said: It is pure but not purifying, so it is not used. There is no clear evidence for prohibiting its use, but leaving it is good as a precaution.
As for the dust that remains in the container, this is not used. And likewise the water in the container after a person has performed wudu from it, it is not used. Yes.