Thanks, I was wondering how they were going to keep it clean, and the linked article doesn't have the word "clean" in it at all, so it could be improved by disc

Thanks, I was wondering how they were going to keep it clean, and the linked article doesn't have the word "clean" in it at all, so it could be improved by discussing more about that. I also see now that the little robot is in the pic in the linked article too.