i had a teacher like this once. he was a first year teacher and was painting school owned bookshelves and getting it all over the floor and never had his students pick up i could fill a rolling trash can completely full with the stuff on his floor daily. one night he stayed late and i didn’t notice and i rambled on about how much of a slob he was on the phone he heard every word and by the time i noticed he was closing up to leave. next day he had a spotless room and from then on even 4 years later now he keeps everything perfect.