Noooo, not harsh, this is fully growed-up human beings we're talking about, the ones that have left school and had children. These are the people that come the next election go out and decide who is going to govern us, they drive cars and are allowed to travel by plane, alone.
They know the difference between right and wrong, good and bad, going to work and taking the pee.
Yep, she's been allowed to run amok treating the premises as her playground and doing the bare minimum work, but she still has to bare responsibility at some point in her life.
Read her the riot act, sack her, make her sit on an industrial estate one evening wearing a plaque telling the whole town she is not worthy to clean toilets, let the rest of the staff know who runs the show.
You'll be doing her a favour.
Who needs a life coach, it's all so obvious

Funnily enough, am a bit short staffed at the moment