thanks for your feedback! and yes, the smell that sometimes comes from the tubes (especially on hot days) can really be annoying! it´s an old building with an old drainage system and the apartment is on the top floor. can´t really do much about it. my neighbour has the same problems but unfortunately i haven´t found a solution to that yet..
regularly (every day) pouring water through the shower/sink and closing the bathroom door when you´re going out can help a little.