New Shower Turning Blue?

What is the blue tint?

The light-blue staining on white shower walls and floors is almost always caused by copper in the water supply. When water sits on the plastic or acrylic surface, minerals react and leave a blue film. The good news is that plastic does not absorb copper, so the stain is always removable.

Learn more about [copper staining](ca://s?q=Explain_copper_staining_in_showers) or [mineral buildup](ca://s?q=What_causes_mineral_buildup_in_showers).

Why contractors say “replace the shower”

Many homeowners are told the discoloration is permanent or the plastic is damaged. But this is incorrect. If vinegar, bleach, or citric acid removes any part of the stain, then the stain is not permanent. It is only surface-level copper.

The Vinegar Method (Frank’s Real Experiment)

This is the method you discovered — and it works better than most commercial cleaners.

Step-by-step:

1. Fold paper towels so they lie flat.
2. Place them directly on the blue areas.
3. Pour 5% white vinegar until the towels are fully soaked.
4. Make sure no wrinkles are touching the wall.
5. Leave for 1 hour.
6. Remove towels and check progress.
7. Repeat 3–4 times until the blue is gone.

Explore more about [the vinegar method](ca://s?q=Walk_me_through_vinegar_method) or [citric acid cleaning](ca://s?q=Help_me_use_citric_acid_safely).

What Frank Observed

• Towels must be perfectly flat.
• Any tiny area not touching the wall stays blue.
• The blue doesn’t wipe off — it breaks down.
• Darker blue areas respond fastest.
• Floor stains lighten within 5 minutes.
• Full cleaning takes multiple rounds.
• Slow but 100% effective.

Why Vinegar Works

Vinegar is a mild acid that dissolves copper deposits without damaging plastic. Commercial cleaners like CLR or citric acid work faster, but vinegar is cheap, safe, non-toxic, and easy to apply with towels.

Compare [vinegar vs CLR](ca://s?q=Compare_vinegar_and_CLR_for_blue_stains) or [vinegar vs citric acid](ca://s?q=Compare_vinegar_and_citric_acid).

Should You Replace the Shower?

No. Not unless the plastic is cracked or physically damaged. Blue staining is a cleaning problem, not a structural problem.

Final Advice

If your shower is turning blue:

• Don’t panic.
• Don’t call a contractor.
• Don’t spend $10,000.
• Use vinegar, paper towels, and patience.
• The stain will disappear.