Every time we happen to cohabit the water closet at similar times, I
Turn on hot water, full blast
Wash hands in an OCD fashion for a LONG time while running the hot water at the same time.
Turn off water, dry hands.
Before doing ANYthing else, flush
Turn on water, repeat previous action.
Could she waste more water during one individual trip? How many trips does she take? Could I be more annoyed? Have I asked enough questions?? Just don't be a waster!