Yeah cause they have it down to a system. Clean tubs are ALWAYS sitting by cause someone washes them, so all they have to do is take the tub put some bedding or paper in it, water bowl, water, and your done with that tub just put the snake in and your good to go.
Me personally every time my snakes poo, i clean the tub and hide and water dish with soap and water. It takes longer, but i feel better about everything being clean. Of course i could make it easier for myself, and i will over time but for now with 5 snakes, its not too bad. Now 100+ snakes, thats a different ball game.