How do you get small purple stains from my shampoo off tub?

Did u try cleaning with bleach and Mr. clean sponge

Paste of baking soda and vinegar. Place a damp paper towel over it and let it sit for 15 to 30 minutes. Regardless of what the bottle or container says or does not state, I would just rinse away just to be sure. If it really stained your tub, write them and enclose photos. If it is happening to you, it might be happening to others. What brand of shampoo?

Good ideas listed above. I suggest rubbing alcohol, it will often remove ink and dye stains. Pour it on a rag and rub the stain on your tub.

Good luck!

To remove small purple stains from shampoo from the tub, you can try the following:

1. Mix together equal parts baking soda and white vinegar to create a paste.
2. Apply the paste to the purple stains and let it sit for a few minutes to allow it to work its way into the stains.
3. Using a scrub brush or a sponge, gently scrub the affected area to loosen the stains.
4. Rinse the area thoroughly with water to remove the paste and any remnants of the stains.
5. If the stains are still present, you can try using a stronger cleaning product, such as a bleach-based bathroom cleaner or a commercial tub and tile cleaner. Follow the manufacturer's instructions for use and be sure to wear protective gloves.
6. If the stains are still not coming off, you may need to use a pumice stone or a commercial stain remover specifically designed for removing purple shampoo stains.
7. Once the stains are gone, be sure to rinse the tub thoroughly to remove any residue from the cleaning products.

How to Get Purple Shampoo Stains Out of Bathtub

https://smarthomepick.com/how-to-get-purple-shampoo-stains-out-of-bathtub/

Purple shampoos have either ammonium salt or aluminum salt in them, both are water soluble.

If yours has aluminum salt, use plain white vinegar to clean it.

If it has ammonium salt use 1 part ammonia and 3 parts water.

If your purple shampoo is different then use an acid cleaner or a mineral clean (CLR), but first test a small area so you don't ruin the finish of your tub.