How to put an end to littering cigarette butts in toilet urinals

Many urinals are often reminded not to throw cigarette butts and sundries, but they still see cigarette butts and chewing gum in the pool. Only those who have seen incantations and throw cigarette butts and sundries will die a natural death! Sure enough, the urinal is very clean. It is unknown whether it has just been cleaned or whether the spell really works.

Although it is not civilized to write this spell, it may be out of desperation to deal with uncivilized people in an uncivilized way. Anyway, civilized people don't care what they write.