How to Unclog a Bathroom Sink (Hair, Soap, and Slow Drains)

A slow or clogged bathroom sink is almost always caused by hair and soap buildup in the drain. Here's how to clear it quickly without calling a plumber.

What You'll Need

• Drain Snake Hair Clog Remover (3-Pack) — flexible plastic tool with barbs that grab and pull out hair clogs
• Baking soda and white vinegar
• Zeiff Probiotic Enzyme Cleaner — breaks down organic buildup for slow drains and maintenance
• Boiling water
• Rubber gloves

Step 1: Identify the Clog Type

• Completely blocked: Water doesn't drain at all — likely a hair clog near the drain opening
• Slow drain: Water drains slowly — likely partial hair/soap buildup or deeper organic buildup
• Gurgling: Air trapped in the pipe — may indicate a deeper blockage or venting issue

Method 1: Drain Snake (Most Effective for Hair Clogs)

1. Remove the drain stopper if possible (most pop-up stoppers lift out or unscrew).
2. Insert the drain snake into the drain opening.
3. Push down and rotate to hook the hair clog.
4. Pull out slowly — the barbs grab and pull the hair out with it.
5. Dispose of the hair and repeat until no more comes out.
6. Run hot water to flush the drain.

The drain snake is the most effective tool for hair clogs — it physically removes the blockage rather than just pushing it further down.

Method 2: Baking Soda + Vinegar Flush

1. Pour ½ cup of baking soda down the drain.
2. Follow with ½ cup of white vinegar.
3. Cover the drain and let fizz for 15–20 minutes.
4. Flush with a full kettle of boiling water.

Effective for soap scum and organic buildup causing slow drains. Less effective on hair clogs — use the drain snake first for hair.

Method 3: Enzyme Cleaner (For Slow Drains and Maintenance)

1. Pour Zeiff enzyme cleaner down the drain according to directions.
2. Let sit overnight — don't run water for 6–8 hours.
3. Flush with warm water in the morning.

Enzyme cleaner digests the organic biofilm coating the inside of the pipe — the primary cause of slow drains that aren't caused by hair clogs.

How to Prevent Bathroom Sink Clogs

• Install a silicone drain strainer to catch hair before it enters the drain
• Clean the drain stopper weekly — hair accumulates on the stopper mechanism
• Do the baking soda + vinegar flush monthly
• Use enzyme cleaner monthly to prevent organic buildup

Frequently Asked Questions

How do I remove the bathroom sink drain stopper to clean it?

Most pop-up stoppers lift straight out. If it doesn't, look under the sink for a pivot rod connected to the drain — unscrew the retaining nut to release the stopper. Clean the stopper and the pivot rod mechanism, which accumulates hair and soap scum.

Should I use Drano to unclog a bathroom sink?

Avoid chemical drain cleaners like Drano for regular use — they damage pipes over time, especially older metal pipes, and kill beneficial bacteria in septic systems. The drain snake and enzyme cleaner are safer and equally effective.

My bathroom sink is still slow after using the drain snake. What next?

The clog may be deeper in the pipe. Try the baking soda + vinegar flush followed by enzyme cleaner overnight. If still slow, the blockage may be in the P-trap (the curved pipe under the sink) — place a bucket underneath, unscrew the P-trap, clean it out, and replace.