How do you unclog a sink?

Steps to unblock a sink

1. Unclog the trap with a ferret: Push the ferret into the trap and twist it to dislodge hair, dirt and other foreign objects from your sink.
2. Use hot water mixed with baking soda or white vinegar: Pour half a cup of baking soda or hot white vinegar directly into the sink, then fill it to the brim with hot water (be careful not to burn). Leave on for 20 minutes before flushing. Repeat if necessary.
3. Call a professional plumber if previous attempts have not been successful so that they can inspect your system more thoroughly to find the exact source of the problem and proceed with any necessary repairs