Roomba's charging station is near the door to the back yard. The door was opened for el gato, and the floor got wet, and Mr. R got his top-buttons wet.

He could be scheduled but not run.

So I took off hisABS bottom plate, the next day, and removed the battery pack, and replaced it.
Then he ran fine. Nothing like a hard reset to make you feel better.

He's cleaning now. Good boy.

Very nice to have him back.