sentence: A person demonstrates how to unclog a sink using a bristle brush. sentence:   Water rolls down a sink as a narrow bristle brush hovers over the water filled sink. sentence: The stopper in the bottom of the sink goes up and down as the bristle continues to hover over the sink. sentence:   A person turns on the sink faucet and then jams the bristle brush down the faucet and pulls it up and down loosening dark gunk and forcing it into the sink. sentence:   The person rinses the bristle brush off.