How to Fix a Slow-Draining Bathroom Sink

Most slow-draining bathroom sinks are clogged with hair, soap scum, and debris that can be cleared using a plunger, drain snake, or chemical cleaner.

1. Clear the Obvious Culprits. Pull out any hair, soap chunks, or other visible blockages from the drain opening using your fingers or needle-nose pliers. Remove the pop-up stopper if possible by lifting it straight up or unscrewing it counterclockwise. Clean off any accumulated grime and hair wrapped around the stopper mechanism.
2. Plunge the Clog Out. Use a small cup plunger designed for sinks. Cover the overflow holes near the rim with wet rags or tape to create proper suction. Fill the sink with enough water to cover the plunger cup. Plunge vigorously up and down 15-20 times, then quickly pull the plunger away to break the suction. Test the drain by running water.
3. Snake Out Deep Blockages. If plunging fails, feed a drain snake or wire coat hanger bent into a hook down the drain. Push it as far as possible, then twist and pull to catch hair and debris. You may need to work the snake back and forth several times. Pull out any material you snag and run hot water to flush remaining debris.
4. Deploy the Heavy Artillery. Use an enzyme-based drain cleaner for regular maintenance or a chemical drain cleaner for stubborn clogs. Pour the recommended amount down the drain and let it sit for the specified time. Flush with hot water afterward. Never mix different types of drain cleaners, and ensure good ventilation when using chemical products.
5. Take Apart the Trap. If other methods fail, place a bucket under the P-trap beneath the sink. Unscrew the slip nuts on both sides of the curved trap using channel-lock pliers. Remove the trap and clean out all debris with a wire brush and hot water. Check the trap for cracks while cleaning. Reinstall with new rubber washers if the old ones are worn, and hand-tighten the slip nuts.