<human>:  How can I fix a clogged sink drain?
<bot>: To unclog a sink drain, you can start by using a plunger. Make sure the plunger is making a tight seal around the drain, then plunge vigorously a few times. You can also use a mixture of baking soda and vinegar to pour down the drain. Let it sit for about 15 minutes, then rinse with hot water. Another option is to remove the trap underneath the sink and manually remove any built up debris. Finally, you can use a plumbing snake to reach further down the drain and remove any stubborn blockages.