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How to Clean a Granite Sink in 5 Simple Steps

how to clean a granite sink
Written by Jenny Molin

Granite sinks are an amazing addition to any kitchen. They have grown in popularity thanks to their durability, attractive looks, and affordable price. However, regular cleaning is a must in order to maintain the attractiveness it offers. Unlike other kitchen sinks, these sinks need special care to keep them hygienic and sparkling. In this article, we will elaborate on how to clean a granite sink.

How to Clean a Granite Sink? – General Cleaning

Clean a Granite Sink

1. Pick Important Supplies

The supplies you need for cleaning your kitchen sink are easily obtainable and mostly available at home. You are going to need baking soda, vinegar and mineral oil for the solution.

The vinegar and baking soda will be mixed together to clean your sink while the mineral oil will be applied afterwards to bring back the glossiness.

2. Prepare the Sink for Cleaning

Before you start cleaning, your sink needs to be emptied completely. You can fill your sink with hot water and flush it out afterwards. After that you need to dry it out with a dish rag or a paper towel.

3. Apply Baking Soda and Vinegar

Spread baking soda all over your sink if you want a full-on clean. Baking soda is usually rough but it shouldn’t be a problem for granite. After that, apply vinegar over the areas covered with baking soda. You can mix water with the vinegar if you want to use less vinegar.

4. Scrub Scrub and Scrub

Once the two elements are combined and fizzed up, use a brush with soft bristles or a sponge to scrub the sink. Concentrate on the problem areas like the corners.  You don’t want to apply too much pressure while scrubbing because it might take off the coating that keeps the sink glossy.

5. Wash & Dry

Once you’re done scrubbing, rinse everything off with warm water and flush it off. Do it for 2-3 times and when your sink looks clean enough, dry it off with a soft washcloth or a paper towel. Your sink should look perfect by now.

6. Apply mineral oil

Now that your sink is clean and dry, it’s time to make it sparkle. Take 1/2 tablespoon of mineral oil depending on your sink size and rub it all over the sink with a soft piece of cloth. This works best if you gently buff the oil on your sink in a circular motion. Apply the oil equally in all sides of your sink and volla! You have a clean and shiny granite sink glowing in your kitchen.

Cleaning Hard Water Stains

Cleaning Hard Water Stains

Hard water stains often look like chalky white residues that occur when excess minerals are present in hard water. Here’s a step-by-step elaboration of how to clean hard water stains:

  1. Clean out any debris or food stains from your granite sink with non-abrasive scrubbers and pH-neutral cleaners.
  2. Select the proper cleaning product. You need to keep in mind that hard water stains have resistance over pH-neutral cleaners. Also, if you use neutral products such as dish soap, you’ll need more force than usual. So, collect a suitable scum and mineral deposit remover for granite instead.
  3. Start applying cleaner on your granite sink. You’ll also need to dampen your scrubber while doing so.
  4. Start scrubbing your granite sink. Use concentrated pressure while scrubbing the hard water stains and other grimy-looking spots.
  5. Rinse the sink when you’re done. Usage of a spray hose is highly recommended for this part. Wash all the soap and flush off your granite sink. You might need to do it all once again if the stain remains even after following all these steps up to this one.
  6. Dry your granite sink off gently with a piece of clean cloth.
  7. Apply mineral or olive oil when your sink is dry. Use 1-2 tablespoons of oil and wipe it all over your granite sink with a piece of dry and clean cloth. Keep wiping until you can’t feel the stickiness of the oil with your finger. This will keep your sink from hard water stains for a long time.

Stubborn Stains Removing

Here’s a list of things you’ll need to remove stubborn stains from your granite sink:

i) Whitening powder (powdered chalk/talc/molding plaster)

ii) Hydrogen peroxide

iii) Plastic wrap

iv) Putty knife

Here’s how you’ll do it:

  1. Clean and dry your granite sink.
  2. Make a paste solution by mixing whitening powder and hydrogen peroxide. The mixture should be as thick as peanut butter.
  3. Apply the mixture directly on the stubborn stains you’re trying to remove. Use a putty knife while applying. There should be a layer of paste that’s at least 1.25cm thick.
  4. Cover the pasted area with a plastic wrap and secure the plastic wrap with tapes on each corner.
  5. Leave it like that for at least 24 hours.
  6. After 24 hours, remove the plastic wrap and wipe the dried paste away as much as you can. You can use a blunt scraping tool or even a soft sponge or towel to remove the paste. After removing the paste, do not try to wash it down the drain. Dump it elsewhere.
  7. Wash your granite sink with dedicated cleaners and warm water. You might have to repeat all of the steps above once again if the stains don’t go away.

Things Not To Use On Your Granite Sink:

Though granite sinks have a great durability, some things are better not used on them for various purposes. These things are-

i) Abrasive materials: Materials like steel, wood and abrasive brushes should be avoided. These materials will leave scratch marks and damage the surface of your granite composite sink.

ii) Harsh Chemicals: Chemicals such as ammonia, sodium hydroxide, ammonia, sulphuric acid and hydrochlorides are harmful for your granite sink. These elements damage the coating on the surface and mess up the astonishing look of the sink.


Q. 1: Are granite sinks hard to keep clean?

Ans: Absolutely not. Granite sinks take as much time and effort as any other sink to clean or take care of. Rather granite sinks are easier than other sinks to take care of.

Q. 2: Can Clorox wipes be used on granite?

Ans: You should probably avoid using acid-based cleaners on granite. The acid in this type of cleaners can leave unsightly stains on your granite composite sink.

Q. 3: Is hydrogen peroxide safe for granite?

Ans: Hydrogen peroxide won’t immediately damage granite-made things so technically yes. But with the repeated application, it will damage granite. That’s why we won’t recommend it for your granite composite sink.

About the author

Jenny Molin

Interior Design Artist

Hello, I’m Jenny. I’ve been an interior design artist by profession since my B.S. in Interior Design. I’m a minimalist and prefer to save space when choosing fixtures, sinks and fittings. My style tends to make the most out of the least amount of space. The idea behind every interior design project is unique and it reflects personal style, taste and tradition. I’ve learned more when working than I ever did while I was studying in college. I worked in more than 12 hundred households all across the US and got positive feedback. I’ve been working with FaucetsReviewed as one of the founding members and regularly contributing to the site via testing and reviewing various interior fittings and fixtures.

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