Oh.  Sometimes it's unpleasant, and it's physically demanding work!
I know the work can be physically demanding and sometimes pretty dirty too. Janitors don't make enough money!
I used to work as a janitor at an office building.  I worked at night so it was quiet and sort of nice. Oh did you?  I understand that sometimes janitors do security and mantenance duties. Yeah, I was also told to look for anything out of the ordinary as well.
The work can be physically demanding and sometimes dirty and unpleasant.