Finding a clean toilet while travelling with the car is sometimes an issue. I pay gladly for one to exist and for it to be clean. It is a service and people do not value it enough so they tend to take it for granted and leave any toilet accordingly. If people would be more sensible shops and petrol stations would offer that service for free as a convenience for customers and guests. But people tend to piss on things that are free as worthless unless it's a public WiFi then they become aggressive when it's off.