Well I do believe they have nanobots that can be inserted into a person and actually programmed to perform certain duties like artery cleaning, experimental stuff that doesn’t hit the news.
Its not beyond our current level of technology to create self replicating nanobots.
Now if we could make nanobots that would enter the brains of creatures such as Chrissy, Algore, Obummer, and others and clean out the garbage we would really have something.
You would have to give them a means and desire to (1) protect themselves and (2) give them a lifespan so that they would not take over the planet. Of course the first thing they might do is a use (1) to attempt to circumvent (2).