We see shots of a sink.  A person sprays the sink with a bottle then uses scrub brushes to scrub the sink.  The person rinses the sink the wipes it with a  blue towel.  The person then rinses the sink again and wipes it down with the blue towel again.  The person sprays the sink with a solution and uses a small roller paint brush to run the solution into the sink.  We see before and after shots of the sink.