<human>:  How do I unclog a sink?
<bot>: To unclog a sink, you can first try using a plunger. Place the plunger over the sink drain, ensuring that it is completely submerged, and then pump the plunger up and down vigorously. If that doesn't work, you can try using a product like a drain cleaner or bleach mixed with hot water to break down the clog. You can also unscrew the trap underneath the sink and remove the clog by hand.