"A glitch, that's all." Dudley defensively replied, but Sir could tell the manager bot did not seem entirely convinced that that was the case either, but it was the explanation they resorted to, to explain away what they could not figure out. For the facts were apparent as Sir had understood them.
"Sounds like you've got it all figured out." Dudley added snidely.
Sid's intuition was likely to be more trustworthy in this regard than Dudley's handwaving. The cleaner robot knew well when something was dirty; they knew how dirt and decay presented, what its causes were, and what was needed to fix such situations. All Sid needed was to bear witness to such dirt and they would recognise it. It was time to give the power plant a proper once over: Sir could talk to the workers, while Sid could ferret out what the malfunctions were.
The Engine Hall was a good place to start to investigate where the malfunctions might be, for it housed the generator itself that created the electricity, the turbine that powered the generator, and the transformer that delivered the energy. To speak with the power plant workers, they could be variously found either at their work stations, or possibly in the recreational area on their off-duty breaks.
OOC:
Still confirming that Dudley isn't lying or hiding anything (as based off the earlier success roll). But his pride will never let him admit he's wrong.
I've provided two directions which you can take. We can start with the Engine Hall, but if you want somewhere else that's fine too.