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How to Clean Gunk Out of Bathroom Sink Drain: Professional Tips

Isn’t it an unpleasant condition when you smell the stench and the bathroom sink drain is clogged? Even we experience drains moving slowly where bacteria from sewage lines stick and form stubborn clogs.

What actually causes such a frustrating moment? How to clean gunk out of bathroom sink drain? Well, you can try solutions such as:

  • DIY method
  • Using plunger
  • Getting a drain snake
  • Wire hanger
  • Homemade gunk cleaning solution
  • Call a plumber.

However, following the instructions will help you clear the gunk and ensure the sink drains properly. Now, let’s walk a little further to learn about the process of cleaning the bathroom sink drain in detail.

What Causes Gunk in Bathroom Sink Drains: 10 Reasons to Blame

causes of gunk in bathroom sink drains

Most of the time, we discover black residue in the bathroom sink drain. Such unpleasant situations take place due to eight major facts, such as:

1. Improper Cleaning

Undisciplined maintenance or cleaning is the first culprit that helps to develop gunk in the bathroom sink drain. Over time, gunk is formed by the buildup of dirt, or jammed items like soap scum, hair, phlegm, or other organic matter.

2. Knotted Hair

Hair that falls out while washing traps in the bathroom sink drain. Typically, wet hair attracts more wet hair until the unappealing clump obstructs water flow. Hair may also combine with other trash to form black slimy things or gunk.

3. Soap Scum

Minerals can mix with any sort of soap, shampoo, shaving cream, skin cells, or other substances. With such materials, soap scum ultimately leads to the creation of gunk.

What Causes Gunk in Bathroom Sink Drains

4. Toothpaste and Dental Items

Ingredients from mouthwash or toothpaste, along with dental goods, can become sticky to the wall. Eventually, it causes filth to accumulate in the bathroom sink.

5. Excessive Moisture and Lack of Ventilation

After taking a shower in the bathroom, you may notice a humid environment. The excessive moisture in the bathroom may create a breeding environment for bacteria or fungi. Over time, the environment contributes to the production of gunk in the bathroom.

6. Fat Or Grease

You can never imagine that even fat or grease can clog the drain. While fats or oils flow down the drain, the clog gathers and blocks the bathroom sink drain pipe.

7. Food Waste

We often use the bathroom to wash dishes or food items like vegetables or fruits. But we never think that food residues can contribute to the formation of messy substances.

8. Rusted pipes

Potentially, the old metal pipe will rust. After a certain period, rust accumulates and clogs the bathroom sink drain.

9. Hard Water Deposits

If your home only receives hard water, mineral deposits can build up inside the bathroom. These deposits, in particular, form black gunk with time.

10. Biofilm

Any black or sticky gunk or coating can develop due to a fact like a biofilm. It’s basically when bacteria, fungi, or other microorganisms interact with debris, the bathroom sink drain gets interrupted.

15 Things You’ll Need To Dissolve Gunk In A Bathroom Drain

Gunk In A Bathroom Drain

Just before you start to effectively clean and dissolve the bathroom sink drain, you need some tools and items. Here are the 15 things you should have to fix the bathroom sink drain:

  1. Rubber Gloves
  2. Boiling Water
  3. Baking Soda
  4. Salt
  5. White vinegar
  6. Drain snake
  7. Plunger
  8. Wire Hanger
  9. Pipe brush or an old toothbrush
  10. Drain cleaner
  11. Biodegradable pipe cleaner
  12. Hydrogen peroxide
  13. Apple cider vinegar (optional)
  14. Lemon juice (optional)
  15. Unclogging petroleum gel (optional).

How To Clean Gunk Out Of Bathroom Sink Drain: 5 Magical Solutions

We explored the causes of gunk development in the bathroom sink drain. Now, it’s time to give you some effective solutions! If you have a little knowledge and some tools and cleaners, you can bring the bathroom sink condition back to optimal!

How To Clean Gunk Out Of Bathroom Sink Drain

Solution 1: DIY Method

In the beginning, you may look for the answer to “How to clean bathroom sink drains naturally?” Well, the do-it-yourself method is the first idea you can utilize, which is natural and easiest! All you have to do is:

Step 1: Wear rubber gloves because sticky gunk can get stuck to your bare skin.

Step 2: Then, detach the drain stopper and clean the drain area properly.

Step 3: Scrub the area well, replace the outlet, and run the water.

Solution 2: Use the Plunger

Black gunk in the bathroom sink drain is such a mess. But if you have a cup-shaped plunger in hand, dissolving the bathroom sink is quite easy. Let’s look at the steps to cleaning the sink:

Step 1: Cover the bathroom sink halfway with water.

Step 2: Put the plunger in the bathroom sink drain. You can add petroleum jelly around the plunger’s edge.

Step 3: For around 30 seconds, press and twist the plunger to wipe away the obstructions in the drain pipe.

Step 4: Hold with a moist cloth to keep the water from flowing out of the overflow hole.

Step 5: Run the sink with hot water until you notice the drain running properly.

Solution 3: Drain Snake Is Helpful

Drainage systems usually get clogged or produce gunk due to obstructions. Then what if we use a plug or drain snake from the nearby local hardware store? It will help you remove the stubborn deposits. However, follow the given steps:

Step 1: Position the drain snake in place of the bathroom sink.

Step 2: Gently press it until you confront pushback.

Step 3: Turn the snake clockwise until the barrier or clog moves or breaks down.

Step 4: Twist the handle to unlock just when you get extra pushback.

Step 5: Run the faucet to flush the leftover gunk near the drain.

Solution 4: Wire Hanger Plays a Great Role

If you need to know how to clean hair out of the bathroom sink drain or even other clogs, a wire hanger is a magical dissolver tool! Just simply follow the instructions:

Step 1: Take off the sink stopper and form the hanger end like a hook.

Step 2: Push your hanger down the bathroom sink drain gently to reach the gunk.

Step 3: Twist the hanger to grab the obstacles or hairs to pull out.

Step 4: Continue pulling out dirt until it’s clean.

Step 5: End up by running water to empty the drain.

As an alternative to coat hangers, needle-nose pliers can play the same role.

Solution 5: Homemade Gunk Cleaning Solution

Have you ever wondered how to remove black sludge from bathroom sinks with a homemade natural cleaner? Let’s check out the magical methods to dissolve the stubborn buildup in the sink drain.

Step 1: Begin with half or one cup (220 grams) of baking soda.

Step 2: Then, pour half or a cup (240 mL) of distilled white vinegar down the drain.

Step 3: You’ll notice a chemical reaction that produces carbon dioxide while dissolving the gunk.

Step 4: Let the combination settle and fizz within 15 minutes. Vinegar’s antibacterial features basically cause fizz.

Step 5: Use boiling water to flush the sink.

Natural bathroom sink cleaning and deodorizing become successful if you also have things like:

  • Baking Soda
  • Vinegar
  • Salt
  • Hydrogen Peroxide
  • Lemon Juice
  • Cream of Tartar.

All of them accomplish the same gunk-cleaning job in the sink.

Bonus Tip: Call A Professional Plumber

When anyone is experiencing problems with the bathroom sink drain, professional plumber assistance is always recommended. They’ll diagnose and clear the gunk out of the drain. To hire a plumber, you may follow these tips:

  1. Look for local plumbers
  2. Contact with a few plumbers
  3. Ensure the plumber’s experience level
  4. Share the problem and fix a cost rate, whether hourly or entirely.
  5. Make an appointment and be available on time.


We’ve included some frequently asked questions to inform the readers of more ideas. We hope they’ll let you know some additional ideas on bathroom sink drainage problems and solutions.

Q. What is the best way to clean out a bathroom sink drain?

The combination of boiling water with baking soda and vinegar will take away bathroom sink gunk effectively. Just properly scrub the pipe with a small brush to remove the stubborn dirt.

Q. Which chemical is used for unclogging drains at home?

Sodium Hydroxide, or Caustic Soda, is the best gunk or clog cleaner at home that unclogs bathroom sink drains.

Q. What do plumbers use to clean pipes?

Expert plumbers frequently use tools such as drain snakes or augers to unclog pipes. They also utilize high-pressure water with 4000 PSI hydro jetting to clean the pipe.

Final Words

Cleaning gunk from the bathroom sink drain is quite essential for those who maintain hygiene and prefer proper drainage. Our solutions, along with steps, will properly guide you on how to clean the gunk out of the bathroom sink drain. Either you get your tools, like a plunger, coat hanger, or drain snake. Or use a natural cleaner like baking soda or vinegar with boiling water.

But first, try the DIY method! And ensure you properly maintain the bathroom sink to improve ventilation or prevent blockages. Or even after upkeep, if the gunk develops, just go through our tips and say goodbye to the sticky obstacles!