1. Empty and rinse — First of all, you can’t clean your sink while it’s filled with cups and dishes. So, empty it out and remove any food residue from the plug. Give it a quick rinse to wash away any immediate stains as well.
2. Scrub with soap — Next, you’ll want to use a few drops of dish soap and a non-abrasive sponge to give your sink a preliminary scrub. Be sure to cover the entire sink, including the walls, any hidden crevices and around the plug hole. Don’t forget to give the faucet a once over as well. Once you’ve done this, rinse away the soapy water.
3. Apply baking soda — While your sink is still damp, sprinkle baking soda over all of the surfaces. Baking soda is a brilliant cleaning agent because it breaks down dirt and grease and can scrape away stains, but it’s not so abrasive that it damages the stainless steel.
4. Scrub — Using your sponge (make sure it’s non-abrasive), scrub the baking soda in the direction of the grain of the stainless steel. The grain should be visible to the eye if you inspect the surface — you can also feel it if you run your fingers over it.
When combined with the residual water, the baking soda should form a thick paste. Continue scrubbing until you’ve covered the entire surface. Don’t rinse away.
5. Spray with vinegar — For extra cleaning power, you'll now want to spray distilled white vinegar over the baking soda. This will create a fizzy chemical reaction which dissolves and dislodges stains; that’s what makes baking soda and vinegar so good at cleaning.
This can smell quite strong, but vinegar is brilliant at removing watermarks and limescale, so it’s worth ventilating the room and enduring it. Wait until the solution finishes fizzing and then rinse it away.
If you don’t have vinegar to hand, lemons are another option you can use here. Simply cut one in half and scrub a segment on top of the baking soda in the direction of the grain. Much like vinegar, lemon juice is useful for removing limescale, plus it smells great too. Rinse away once you’ve finished.
6. Tough stain solutions — If stains are still apparent, you will need to break out the big guns. One option is to use a proprietary cleaner, such as the Therapy Stainless Steel Cleaner Kit. If you’re using alternative cleaners, make sure they’re suitable for use on stainless steel — some cleaners as well as abrasive tools can damage this surface.
Alternatively, you can create a homemade solution by combining ¼ cup cream of tartar with one cup of distilled white vinegar. This will form a paste which you can apply directly to any stubborn stains. Gently dab it in place using a sponge and then leave to sit for a few minutes. Once time is up, rinse away the solution and repeat the process if necessary.
7. Dry the sink and buff — Once all of the stains are removed, thoroughly dry the sink using a microfiber cloth. This is an important step because any residual water will form fresh watermarks, making your efforts redundant. Now that your sink is spotless, it’s time to make it shine. Apply a couple of drops of olive oil to a microfiber cloth and rub it on the stainless steel, moving in the direction of the grain. Remove any excess and you're done.