I used this staple kitchen ingredient to refresh my exterior walls for spring — my neighbors can't believe it worked

Before and after photos of cleaning a dirty exterior wall
(Image credit: Future/Annie Collyer)

I need to start my spring cleaning jobs ASAP. I've already started on a few spots indoors — like deep cleaning my pantry and scrubbing my stair carpet — but really, I need to work from the outside in. After all, it's the outside of my house that my neighbors can see. And, this is what greets my guests before they set foot into my entryway.

I've already pressure-washed my patio, so naturally, the next step is to tackle my grubby outside walls. Truly, it's a sight that I don't want my neighbors and guests to see for any longer. So this current dry spell that we're having is proving itself to be the right time to tackle this problem.

With that said, the front of my house could do with a pressure wash — the position it faces means it looks very dirty, plus it's a large area. The back of my house, though? This is more of a spot cleaning job, hence why I asked AI to tell me a non-toxic way to clean these walls. No bleach required, as I have a dog and a toddler to think about.

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Now on sale, this baking soda comes in an 8-oz pack, so there's plenty enough to use to clean your exterior walls and more. Your spring cleaning staple, for only — a total steal!

1. Make your solution

Bucket of water and bicarb with scrubbing brush on patio

(Image credit: Future/Annie Collyer)

In a bowl, you'll want to mix a cup of baking soda with 2-3 litres of water. Grab a soft but sturdy brush and apply this solution to your dirty walls. Be prepared: this might get messy. I found that applying this near my French doors meant that white water splatters ended up all over them!

Before cleaning a dirty outside wall

Before cleaning (Image credit: Future/Annie Collyer)

Once you're finished scrubbing the area, you'll notice it looks even dirtier than before. This is normal, and it's exactly what I meant when I said it gets worse before it gets better. Trust the process.

2. Have a little patience

Cleaning a dirty exterior wall with bicarbonate and water solution, wall is wet and looks dirty

During cleaning (Image credit: Future/Annie Collyer)

You'll then need to wait around 5-10 minutes for the solution to soak in. It may dry a little, but don't panic: it'll wash away even if it does dry.

It goes without saying that you'll want to do this on a dry day; the solution will wash away straight away, so it won't have a chance to set.

3. Grab your hose

After cleaning exterior wall - with visible clean patch

After cleaning (Image credit: Future/Annie Collyer)

Here comes the satisfying part of washing it away. Grab your hose and turn it on. Spray the wall, and you'll literally watch the dirt melt away from your walls. I couldn't believe my eyes at this point!

You can see the part of the wall I scrubbed with this solution vs. the part I didn't. Which means I now need to go over the entire wall and cover the spots I may have missed.

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This electric pressure washer will blast grime, mildew, and dirt off virtually any surface. It has a flexible 25-inch kink resistant hose, a 35-inch power cord, built-in detergent tank, and 5 power nozzles, with a 14-amp TruBrushless motor.

The final verdict

Before and after photos of cleaning a dirty exterior wall

Before vs. after (Image credit: Future/Annie Collyer)

While I wouldn't encourage you to use this method to clean a large area, for instance, the entire front of your house, as it'd be time-consuming, this is a really great alternative to pressure washing. Especially if you're without a hose connection, a pressure washer, or only need to clean a small corner of your outside space.

This would be ideal for cleaning balconies, terraces, or small patio areas. It works fast and is totally safe to apply around children and pets. Plus, the best part about it is that it only requires one ingredient — and you probably already have it in your pantry.


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Annie Collyer
Freelance Contributor

Annie is a freelancer at Tom's Guide. She's been an Editor at various home magazines for 7 years — reviewing and writing about everything from cleaning products to air fryers and mattresses. Annie started her career at Real Homes as Deals Editor in 2018 and by 2020 she was the UK Shopping Editor at Livingetc, Homes & Gardens, and Ideal Home. She was in charge of the majority of eCommerce content on these sites, including reviews and buying guides. Now, as a freelancer, she writes features, reviews, and guides for several brands including BBC Good Food, Ideal Home, and Parade Home & Garden.

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