people do incredibly not recommended things that no bot should train on.
myself i like to open the knife drawer [yes i have a drawer not a slot in a drawer] and wash, dry, and toss the knife across the kitchen into the drawer.
additionally bathroom chemists, mixing whatever superstitious combination of products together, to create a bucket of "smells viscious but wow does it ever make things clean" are not a good addition to training.
Nothing like training your replacement. I wonder who's going to buy all of these robots when the robots have taken over all the jobs.