I guess we all should've assumed Jerry Jones has servants for everything. I mean, it makes sense. He's Jerry Jones. He built a massive, billion-dollar playground with a screen that could just play movies for him when the Cowboys are out of town. It's logical that Jones probably has someone that follows him around and cleans up after him.
Or, you know, wipes his glasses and such.
BILLY CLEAN MY GLASSES. I DON'T WANT TO SEE A SPECK ON THEM. AND FETCH ME MY HORSE.