Zoran's intensity and attention to detail make him our best option when it comes to jobs like scrubbing chairs, but Lex's good attitude (when he feels like participating. . . most days he likes having tasks to complete) and scrubbing tenacity are making him increasingly useful.
(Also, if you look in the background you will see Dev sweeping the kitchen. It was very important that I documented this. He wanted proof of this occasion he was helping out with the cleaning duties.)