Coffee machine not cleaned

We stopped at the Total garage in Hartbee****rt for coffee from the Caf? Bonjour inside the Total. The self service machine did not dispense milk. When we asked about it, a lady came and opened the machine to replace the mild powder. It was obvious that the machine has not been cleaned in a long time. We took pictures of the inside and left without the coffee because there was no intention of cleaning the machine, only to replace the powder. I would think that a coffee machine should be cleaned regularly. Especially when the staff did not seem particularly busy.