human
What do you do when a clogged sink won't drain?
assistant
You need to first try plunging the sink. This involves using a plunger and forcing water down the drain with it. If that doesn't work, then you may need to remove the trap underneath the sink. To do this, you'll need to turn off the main water supply valve and disconnect the pipes from the faucet. Then, use a wrench or plumbing tools to loosen the nuts that connect the trap to the sink. Finally, pull out the old trap and replace it with a new one.