sentence: Materials to clean a bathroom sink is displayed in the screen. sentence:  Then a man shows the first step to clean a bathroom sink is to fill water and then drain it. sentence:  The second step is to put gloves, and the third step is to wet a cloth and put abrasive power to rub the bathroom sink. sentence:  The four step is to put abrasive powder on a sponge to clean thoroughly the bathroom sink, then the fifth step is to mix vinegar with water. sentence:  In the sixth step, the person puts the vinegar on a sponge, and then cleans the bathroom sink and the faucet.