Quick Answer
CLR alone won’t always remove deep-set hard water stains. Try a baking soda paste, vinegar soak, or commercial poultice for tougher spots. For glass, use razor blades gently; for fixtures, use a toothbrush.
Key Takeaways
- Always start with the gentlest method (vinegar soak).
- Test cleaners on hidden spots first.
- Wear gloves when handling acids/alkalis.
- Showerhead maintenance
- Kitchen sink cleaning
What I just tried 3 rounds of full strength CLR. How do I clean these hard water stains? means in practice
Hard water stains are caused by mineral deposits (calcium, magnesium) left behind when water evaporates. CLR is acidic and helps dissolve some minerals, but repeated use may not penetrate deeply. Stains often require mechanical action or stronger acids/bases to lift.
Quick answer
CLR alone won’t always remove deep-set hard water stains. Try a baking soda paste, vinegar soak, or commercial poultice for tougher spots. For glass, use razor blades gently; for fixtures, use a toothbrush.
Remove Hard Water Stains with Baking Soda & Vinegar
What You'll Need
soft-bristle brushplastic wrapspray bottle
1
Mix 1 tbsp baking soda + 2 tbsp vinegar into a paste.
2
Apply to stain, cover with plastic wrap (traps fumes).
3
Wait 1 hour, scrub with a soft brush.
4
Rinse well.
Troubleshooting & Solutions
Common Problems & Solutions
Why this happens
Minerals build up in crevices over time; CLR may not reach all areas.
How to fix it
- 1Soak the showerhead in warm vinegar for 1 hour.
- 2Scrub with an old toothbrush.
- 3Rinse thoroughly.
Mistakes to avoid
- Using metal tools that scratch finishes.
- Skipping rinsing, which leaves residue.
When to seek help: If stains persist after soaking, consider replacing corroded parts.
Frequently Asked Questions
No. Avoid on natural stone, brass, or painted surfaces unless tested first.