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Cleaning Stains in Spa Hot Tubs

By: Hsin-Yi Cohen BSc, MA, MSt - Updated: 29 Aug 2021 | comments*Discuss
Spa Bathtub Jacuzzi Tub Jetted Bathtub

We all love a hot spa tub or Jacuzzi tub – there probably isn’t a nicer way to unwind after a long day than soaking in a bubbling tub with jets of warm water massaging your back. However, nothing can ruin your enjoyment quicker than climbing into a tub that’s covered in ugly stains or scum marks. So here are some handy tips on how to clean stains in hot spa or Jacuzzi tubs:

Cleanliness is Next to Spa Tub Godliness

Like most things around the home, regular cleaning will go a long way towards preventing the build up of stains – especially soap scum stains. To some extent, cleaning a spa tub or Jacuzzi tub is very similar to cleaning a normal bathtub. What you use can depend largely on the material the tub is made of – such as porcelain, acrylic or fibreglass. However, no matter what material is used, it is best to steer clear of any harsh abrasives as they can really damage the surface of the tub.

Choose a gentle cleaning product that won’t scratch the finish for the inside of the tub and follow the manufacturer’s instructions. You can now buy commercial products specifically for cleaning spa tubs. However, you can probably make do with a regular bathtub cleaner, suitable for the same material. Bleach is often recommended for a thorough clean but it is such a harsh chemical with such strong fumes that you would do best to only use it as a last resort. In fact, there are many environmentally-friendly cleaners that can be just as effective as using bleach – and two of them are right in your pantry!

Baking Soda to the Rescue!

This pantry staple is particularly good for tackling soap scum stains. This is the rim of soap suds and dirt that forms along the usual water line and can be really unsightly to look at, as well as being a breeding ground for bacteria and other micro-organisms. Baking soda is an inexpensive stain remover which is a mild abrasive and does not create excessive suds – perfect for the spa tub or Jacuzzi tub environment.

To tackle soap scum stains, first lower the water level so that the scum line is easily accessible. Next, take a damp cloth and dip it into powdered baking soda – then rub into the scum line, using circular motions. Rinse carefully when you have covered all the scum line and then wipe away again with a clean cloth. It is important to rinse away all traces of baking soda otherwise it could leave white spots on the sides of your tub.

You can also use the baking soda paste on the jets as these can tend to get a build-up of scum along the edges. Again, make sure you rinse all traces away thoroughly. Remember also that baking soda can alter the pH of the water so after using it to remove stains in you spa tub, check pH of the water when you have refilled it.

And Vinegar Too…

Another common stain in spa or Jacuzzi tubs is that from hard water. A good stain remover for this – again environmentally-friendly – is vinegar. Just your common white vinegar in the pantry. In fact, not only does vinegar remove any hard water stains and deposits but it will also tackle dirt and grease stains as well as deodorize the tub and remove any unpleasant odours.

To tackle specific stains, make up a solution of equal parts vinegar and water. Submerge a towel in the vinegar mixture and wet it thoroughly. Wring the towel to remove any excess moisture and then scrub the stained surface of your spa or Jacuzzi tub with the towel. Again, use a circular motion when rubbing and a good firm pressure. Don’t forget to wipe town and tackle the edges of the faucet and tap handles as soap scum, calcium deposits and dirt often collect in these edges and crevices. If you need more abrasive action or to get into hard-to-reach corners (e.g. cleaning the jets), use an old toothbrush dipped into the vinegar solution.

Vinegar does not have to be rinsed away when the job is done and the vinegar odour will soon dissipate, leaving your spa tub smelling fresh and clean.

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[Add a Comment]
Hi can someone tell me how to remove yellow marks from my lazy spa bought lazy spa clear sponges they got mill dew off but yellow marks remain. Tried white wine vinegar and baking soda and pvc cleaner and spray bleach but still there . Thanks
Maz - 29-Apr-21 @ 6:06 PM
Hi ive a dirty yellow stain around the inside of my lazy spa miami and on the floor i cant seem to get it out and would really like it away not really nice to look at any ideas
B3st07 - 19-Feb-21 @ 4:13 PM
We have a hotspring world flash hot tub and unfortunately the speakers have turned a horrid shade of beige. Anyone have any ideas how I bring the colour back and remove the staining Thanks
Pnutz - 1-Sep-20 @ 6:53 PM
I was wearing a red bathing suit in our hot tub and the dye has leaked and stained the sides red and I can’t seem to get it off with vinegar or baking soda, any other suggestions?
Mia - 7-Aug-20 @ 3:51 PM
Hi, I had left the water in my cleverspa hot tub and I use to put a floater in there too with a couple of chloride tablet put new one every two weeks. I got ill and when I went to check on it,inside my hot tub has a yellow stain where the water has been inside, so I empty it and now i dont know if the yellow stain ok for me to go into it, or if I fill it up again or how do I clean it. I need some help.
Bee - 17-Jul-20 @ 2:02 PM
Just wondered if this would work for me? I have a dark grey lay z spa hawaii. I had the kids round yesturday and they picking up some of the bubbles and putting them on the side any way I put the lid on and wiped the sides down and today have discovered white patches on the side that won't come off is this from the bubbles and also would this remedy work for that if not can you suggest anything please? Thanks in advance
Sam - 7-Aug-19 @ 8:13 PM
Hi how do I clean the inside air space that has mould in it thanks
Tippett - 20-Jun-19 @ 11:43 PM
Nick - Your Question:
Very informative! you did a great job detailing everything. This is a well written post. I wanna know, can lemon also remove stains in spa?

Our Response:
We are glad the article helped you. You can try lemon as it is a natural cleansing/bleaching agent.
StainExpert - 24-Jun-16 @ 2:35 PM
Very informative! you did a great job detailing everything. This is a well written post. I wanna know, can lemon also remove stains in spa?
Nick - 23-Jun-16 @ 5:38 PM
We emptied our hot tub, cleaned and waxed it then refilled it. In two days we noticed yellowish brown stain on all the underwater rubber areas. We wiped it with Mr Clean sponge and it came right off except we can't get the hard to reach parts, ridged parts in jets. We tried toothbrush and other things but it did nothing. The only thing that worked was the Mr Clean sponge. Any idea what this is and how can we remove the rest of the stain in hard to reach places?? TUIA for any assistance you may give me!! PS: we asked the Jacuzzi dealer where we bought the spa brand new and they had "never heard of anything like this. Had no idea what to do." Very disappointed in their service.
Dodch - 13-Jun-16 @ 9:14 PM
Iast year I purchased a soho hot tub from a well known supplier, I filled the tub up took photos of it and they dried it off and stored it for the winter. I got it out to use it in April to find the tub had numerous black and pink blotches on the inside, after contacting the supplier they have advised I did not use the correct chemical treatment for the water and I did not dry it sufficiently. I have now been left with these blotches and I am trying numerous different products to remove the stains. Has anyone ever heard of these issues and can advise of what to use to remove them? Thanks Walks
Walks - 2-May-16 @ 8:29 PM
I have tried white vinegar to get rid of the white calcium stains in my SPA, and it did not work. I have also tried Bleach.Do you have any other recommendations? Thanks
Maz - 19-May-15 @ 4:56 PM
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