How To Clean a Granite Sink

Granite sinks have rapidly risen in popularity – more and more people are opting for granite and granite composite sinks over more traditional ceramic ones. 

Although granite sinks are known for their durability (especially compared to cheaper stainless steel sinks), improper cleaning can still cause damage. Granite sinks can quickly become stained and marked with limescale without a proper cleaning regime. 

That’s why we’ve put together this ultimate guide on how to clean a granite composite sink. We’ll cover:

  • Daily cleaning 
  • Deep cleaning 
  • How to remove stubborn limescale stains
  • What not to use on granite sinks
  • How to keep your granite sink in top condition


Daily cleaning 

Regular cleaning is essential to keep your granite composite kitchen sink pristine. For a quick daily clean, you can use dish soap, warm water and a sponge to wipe down the entire sink. Once you’re done, wipe the sink with a clean, soft cloth to dry the surface. You should also avoid leaving wet clothes or sponges in the sink. This will help prevent any limescale build-up or water spots. 

Although wiping your sink down every day might sound like a hassle, this is the simplest way to keep your granite sink looking shiny and pristine. 


Deep cleaning

Occasionally, your granite sink will require a more thorough cleaning. You can use some common ingredients you already have in your kitchen. Sprinkle baking soda over your sink, and then spray with a mixture of white vinegar and water. The mixture should start to fizz. 

You can then gently scrub the sink’s surface with a soft sponge and an old, soft toothbrush to thoroughly clean it. Once you’ve finished scrubbing, thoroughly rinse off the vinegar and baking soda. If there are still stains visible, you can repeat the process. Allow the sink to dry afterwards. You can apply a light covering of food-grade mineral oil to your dry sink. This will add a protective layer. Leave the oil for 45 minutes to an hour to soak in, then buff with a soft cloth. 


How to remove stubborn limescale stains

Hard water stains (also called limescale) are the result of mineral deposits which are left behind when water evaporates. If left for a long time, limescale can be challenging to remove and can detract from the appearance of your beautiful granite sink. Using mineral oil regularly can help to prevent limescale build-up. 

If you’ve neglected your cleaning regime, you might notice a build-up of limescale and hard water stains. If you’ve completed the steps outlined above multiple times and the stains remain, there are some further steps you can take to get your granite sink looking like new.

You can try a mild abrasive cleaner or lime-scale removal product. You can also use a specially formulated cleaner for granite composite sinks. Just be careful the products don’t contain bleach, which could damage your granite sink. Follow the instructions on the bottle, use a soft brush to scrub the stains, and then rinse thoroughly. 


What not to use on granite sinks

Using the wrong materials, products or chemicals on your granite sink can lead to stains or even permanent damage. Avoid using the following products, even if your granite sink has persistent stains. 

Abrasive materials 

Avoid using abrasive materials, brushes or scrub pads (such as steel wool), which can leave scratch marks on your granite sink. Instead, use soft brushes, sponges and cloths to protect the granite surface. 

Harsh chemicals, cleaning products, and bleach 

You should avoid using harsh chemicals, cleaning products and bleach. This could cause real damage to your granite sink. Chemicals to avoid are sodium hydroxide, hydrochloride, sulphuric acid and ammonia. It’s also best to avoid using drain-blocking chemicals or products that involve filling the sink with water. 


How to keep your granite sink in top condition

You can take a couple of steps to ensure your granite sink stays pristine and shiny, even with regular use. We’ve listed some of our recommended steps below:


Clean daily 

The best way to keep your granite sink clean and stain-free is to clean it with soapy water daily and wipe it down with a soft, clean cloth afterwards. This will prevent limescale buildup.


Oil after a deep clean

Another tip to avoid limescale buildup and unsightly water marks is to use mineral oil after a deep clean. This will create a protective barrier and help keep your granite sink immaculate. 


Don’t leave wet sponges in the sink

Try to avoid leaving wet sponges in your granite sink. If left for too long, they can leave behind watermarks, which will require more cleaning to remove. 


Avoid using plastic bowls or drainers

Although you might think using a plastic bowl will help protect your sink, the opposite is often the case. Plastic drainers or bowls can easily accumulate grit underneath them, which can cause scratches when they’re moved around. If you prefer to use a plastic bowl, just make sure to regularly clean the bottom of it and remove it from your sink when you’ve finished using it. 


Be careful of aluminium cookware 

Dragging aluminium cookware across your sink can leave behind streaks, so it’s best to avoid doing this. 


Don’t leave food stains

Leaving food or drink stains to sit can cause more problems later on. Some types of food and drink can easily stain your granite sink (especially fruit juice, tea and coffee), so it’s best to clean up any stains as soon as possible. 


How Mo’s StoneX can help

Mo’s StoneX is an experienced and professional supplier of Dekton, granite and quartz worktops, and beautiful sinks and taps. We offer a wide range of high-quality sinks, including inset, under-mount, AXIS, and SCHOCK sinks. Whether you’re looking for a sleek, contemporary finish or a more traditional look, we have something that will match every kitchen style and design. 

If you’re looking for a beautiful worktop to pair with your stunning new granite sink, our team can help. We have over a decade of experience supplying, templating and installing premium worktops. You can fully personalise your stunning work surface with your choice of finish, bevelling and edging. Get in touch with our team if you’re unsure what worktop would pair best with your chosen sink or is the best fit for your home. 

Fill out our online enquiry form for a free quote if you’re interested in a new worktop, or browse our collection of stunning sinks to find the perfect one for your kitchen renovation!