Question asked:
“What do you use then to wash your hands after using the restroom?”
Answer given:
“Water.”
Which part of the answer did you fail to understand as accurately responding to the question asked?
The questioner obviously didn’t mean “you” in that sense.
So you answered a question from a relative beginner in Yiddishkeit using word games in a way likely to mislead her, as 29 correctly pointed out.
Hope you had fun.