How to Clear a Clogged Bathroom Sink
A slow-draining bathroom sink is one of the most common plumbing annoyances — and one of the easiest to fix yourself. The culprit is almost always a combination of hair, soap scum, and toothpaste that accumulates around the pop-up stopper mechanism. You don't need a plumber, and you probably don't even need to go to the hardware store. A pair of needle-nose pliers, some baking soda, and 15 minutes is all it takes.
Time Required
15-30 minutes
Difficulty
Easy
When to Call a Pro
If clog persists after snaking
Step 1: Remove the Pop-Up Stopper
Try lifting the stopper straight up
Many modern pop-up stoppers simply lift out of the drain. Grip the top of the stopper and pull straight up. If it comes free, you're ready to clean.
Try twisting first if it won't lift
Some stoppers need a quarter turn counterclockwise before they'll release. Grip the cap, twist left, then pull up. If it still won't budge, you'll need to disconnect the pivot rod underneath.
Disconnect the pivot rod (if needed)
Look under the sink for a horizontal metal rod going into the back of the drainpipe. Unscrew the retaining nut by hand or with pliers, pull the rod out, and the stopper lifts free. Take a photo of the rod position before removing — you'll need to reinstall it in the same hole.
Step 2: Remove Hair and Debris
- Zip-it tool ($3-5): This thin, barbed plastic strip slides into the drain and catches hair on the way out. It's the most effective tool for bathroom sink clogs and works without disassembling anything. Push it in as far as it goes, twist slightly, and pull out slowly.
- Needle-nose pliers: For visible hair clumps wrapped around the drain crossbar, use pliers to grip and pull. You'll likely pull out a surprisingly large wad of hair and soap buildup.
- Bent wire hanger: Straighten a wire coat hanger and create a small hook at one end. Feed it into the drain opening and fish out debris. Less effective than a zip-it but works in a pinch.
- Clean the stopper itself: The pop-up stopper is usually coated in hair and soap scum. Scrub it with an old toothbrush and dish soap until it's clean. Pay attention to the bottom of the stopper where hair wraps around the base.
Step 3: Flush with Baking Soda and Vinegar
Pour 1/2 cup baking soda into the drain
With the stopper removed, pour baking soda directly into the drain opening. Use a funnel if needed to get it all down the pipe rather than sitting around the rim.
Add 1/2 cup white vinegar
Pour vinegar slowly into the drain. It will fizz and bubble as it reacts with the baking soda — this is the chemical reaction breaking down organic buildup. Immediately cover the drain with a wet cloth or the stopper to keep the reaction working downward through the pipe.
Wait 15-30 minutes, then flush with boiling water
Let the mixture sit and dissolve soap scum and residue. Then slowly pour a full kettle of boiling water down the drain to flush everything through. The drain should flow noticeably faster immediately.
Step 4: Install a Drain Screen for Prevention
- Mesh drain screens ($2-5): These sit over the drain opening and catch hair before it enters the pipe. They're the single best prevention tool for bathroom sink clogs. Clean them weekly by simply lifting and wiping.
- TubShroom-style catchers: These mushroom-shaped silicone inserts sit inside the drain and catch hair around their perimeter. They work well but need more frequent cleaning than flat screens.
- Monthly maintenance flush: Even with a screen, do a baking soda and vinegar flush once a month to dissolve soap scum buildup inside the pipes. This 5-minute habit prevents 90% of bathroom sink clogs.
- Clean the stopper monthly: Pull the stopper out once a month and wipe off any hair or soap buildup. It takes 30 seconds and keeps the drain mechanism working smoothly.
Pro Tips
- •Skip the chemical drain cleaners: Products like Drano and Liquid-Plumr work, but they corrode pipes with repeated use — especially older metal drain pipes. The baking soda and vinegar method is safer, cheaper, and nearly as effective.
- •Check the overflow hole: Bathroom sinks have a small overflow hole near the top rim. Hair and mold can build up inside this passage and cause odors. Clean it periodically by pushing a bottle brush or zip-it tool into the opening.
- •Enzyme drain cleaners for maintenance: Bio-enzyme drain cleaners (like Bio-Clean or Green Gobbler) use bacteria to eat organic buildup. They're safe for all pipe types and work well as a monthly preventive treatment — pour them in before bed so they work overnight.
- •If the sink still drains slowly after cleaning: The clog may be deeper in the P-trap or branch drain. See our kitchen sink unclogging guide for P-trap removal instructions — the process is the same for bathroom sinks.
Frequently Asked Questions
Why does my bathroom sink keep clogging?
Bathroom sinks clog primarily from hair, soap scum, and toothpaste residue. Hair wraps around the pop-up stopper mechanism and creates a net that catches soap and other debris. Without regular cleaning, this buildup restricts water flow within weeks. Installing a drain screen and cleaning the stopper monthly prevents most recurring clogs.
Can I use chemical drain cleaner in a bathroom sink?
Chemical drain cleaners can dissolve hair clogs, but they also corrode pipes over time — especially older metal pipes. They can damage the finish on pop-up stoppers and are harmful if they splash on skin or countertops. Baking soda and vinegar or a zip-it tool are safer, cheaper, and just as effective for most bathroom sink clogs.
How do I remove a pop-up stopper that won't come out?
If the stopper won't lift or twist out, go under the sink and find the horizontal pivot rod that connects to the drain pipe. Unscrew the retaining nut where the rod enters the drainpipe, pull the rod out, and the stopper should lift freely. Note the rod's position before removing so you can reinstall it in the same hole.
Related Guides
Unclog a Kitchen Sink
Tackle grease clogs with plunging and P-trap cleaning
Fix a Slow-Draining Bathtub
Remove hair clogs from tub drains and overflow plates
How to Use a Plunger Correctly
Proper technique for sinks, tubs, and toilets
How to Use a Drain Snake
For clogs that plunging and flushing can't clear