Clark watches the winner, a man in a brown suit, collect his prized LexClean robot. The lab tech instructs the man to look into the robot’s eye — a glass panel on the front of its head.

“Once your LexClean has imprinted on you, it’s yours for life,” the tech tells him. The man leans in so the LexClean can scan his face. When he moves away, the LexClean follows him like a loyal dog.

Dozens of LexCleans wait behind the technician. Soon dozens of new owners are lined up to collect them.

Clark follows the first winner as he moves around the hall. As the man looks at various displays, his LexClean stays close. The robot doesn’t do anything unusual, but Clark still feels there’s something fishy about the whole situation. As the number of LexCleans roaming the convention floor grows, so does Clark’s unease.

Clark is about to ask the man if he can take a closer look at his prize when the man heads for the exit. The LexClean follows him outside, with Clark just a few paces behind.

Though he’s dressed like Clark Kent, Superman’s senses are on high alert. As soon as they exit the building he hears something strange. Radio waves outside the range of human hearing are coming from the LexClean. The robot is sending out some sort of coded communication. But why would a cleaning robot have a transmitter?

Clark lowers his glasses to use his X-ray vision, but the LexClean has a lead lining. He can’t see a thing.

Clark reaches for his phone to call Lois. “You were right,” he says when she answers. “There’s more to these ‘cleaning robots’ than meets the eye.”

If Clark tries to open a LexClean to look inside, press here.

If he tries to learn the information that the LexClean is sending, press here.