Ever thought about looking at what you were putting into the machine?
Just an idea.
Do you know how much volume is in a large front-end leader’s bucket? Transmission gears, cases and axles are easily covered up in leaves, grass and branches. Plastic and glass bottles contaminate the compost and aren’t seen until they are seen in the end product. Even inspectors combing the incoming waste with metal detectors (a costly process) can’t catch it all.