There is constant smoking on the platforms, everyone who wants and where they want. There are traces of harcotine and junk from fast food all around, there is nothing to say about cigarette butts, they are scattered all over Bonn. You may often think that cigarette butts are part of the building material of roads and sidewalks. In December 2018 , a rat rushed under the train on the second track of the Central Station (apparently due to severe unsanitary conditions ) so, she was lying there until May 2019... But the toilet there is gorgeous, beyond praise, and the coffee at McDonald's is excellent...