Hah. the toilet water being used to clean bathroom mirrors is a real thing. A principal wrote in that they had trouble with girls leaving lip stick prints around...they narrowed it mostly to a specific class (Timing) and had the girls witness how the custodian had to clean up their mess and it was very inconsiderate to the Janitor. Well, the girls saw that mop go into the clean toilet then slap against the mirror and their eyes got huge. Lipstick stains stopped, but the principal suspects it wasn't so much about them feeling sorry for the custodians 🙂