Yep he wasn't cleaning or he would have at least flushed the toilet! He also didn't have any cleaning equipment with him.
Tadpoles I don't really care about an apology, but I thought maybe they'd enforce staff using normal toilets rather than the ones in the parents room if I contacted them.
I might just drop them a quick email, I won't make a big deal of it but just to let them know. Especially as parents rooms are there for shoppers comfort, so they shouldn't be made to feel uncomfortable by centre staff.