<human>: How do I know if I have a clogged sink drain?
<bot>: Check for visible water in the sink. If you see any, it could be due to a clogged drain.2 Try using a plunger. Place the plunger over the drain and press down firmly several times. If the water drains quickly, then the clog is likely not too far down.3 Use a plumbing snake or auger. Insert the tool into the drain and turn it clockwise until it hits the clog. Pull it up slowly and check for debris that has been removed.4 Call a professional plumber if the clog persists.