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Castile Soap Tub Scrub

Updated: Aug 10, 2022

My Dear Readers,

While I love a clean and tidy home, there are some cleaning tasks that I creatively procrastinate. Among them is the tub in my bathroom. Although cleaning my toilets is also low down on my list, the bathtub takes a seat in the farthest row!

Why is the tub my nemesis? Maybe it’s the size of the job, maybe it’s the awkward shape of a tub, or even the fact that I need to get on my hands and knees to get into all the crevices. Whatever the reason, I’ve avoided it long enough and it’s time to tackle the job.

Because Whole Naturals is an all-purpose cleaner, and because it takes only a handful of household ingredients to customize it for any job, I knew that our Castile Soap would successfully tackle the task.

Attacking the Soap Scum

Adding non-toxic ingredients – such as baking soda, and a bit of salt gives the Castile Soap a gritty, paste-like texture to help attack soap scum, mold and mildew.

And what’s equally important? The scrub tool. I have found that using a plastic-bristle scrub brush works amazingly. What’s even better –I discovered that a broom with plastic bristles is surprisingly effective! Then, I don’t have to bend over, I get a great reach (and I don’t have to climb into the tub!)

My Method

I like mixing all the ingredients in a squeeze bottle with a large spout. It’s easy to shake all the ingredients together, but it’s also easy to squeeze out the cleaning solution.


  • ¾ cup baking soda

  • ¼ tsp salt

  • ½ cup Castile soap

  • 1 tablespoon of water

  • 10 drops of essential oil (optional)


  1. First, add ¾ cup of baking soda and ¼ tsp salt to an empty squeeze bottle

  2. Next, add ½ cup of unscented Castile Soap.

  3. Add in one 1 tablespoon of water (if you have “hard” water, you may find that you will need to double the amount of water to get the right consistency).

  4. Finally, add in 10 drops of your favorite essential oil (I LOVE lemon!!)

I apply my paste all over the tub, the walls – and even the faucets! With my broom, I get in all the nooks and crannies, let it sit for a few minutes, and then mildly scrub. Once my paste is applied, I take my nozzle and rinse it all off.

Added bonus:

This works great as a natural toilet bowl cleaner! I scoop some into the toilet and then clean as usual with the toilet brush.

Next time, I’ll take before and after pictures – you’ll be amazed!


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