A woman is doing a tutorial on how to clean a kitchen sink with baking soda, a toothbrush and cloth rag.  She first takes some baking soda on the rag and scrubs it on the sink.  Then she takes the toothbrush and dips it in the baking soda.  she brushes the toothbrush on the sink edges to clean it.  She turns on the tap and washes the baking soda off of the sink.  Then she takes some vinegar on the wash cloth and wipes the sink down with it.