White vinegar is acidic enough to break down mineral deposits without harming your toilet.
- Pour 2 cups of white vinegar into the bowl, directly onto the stains.
- Let it sit for at least 1–2 hours, or overnight for heavy buildup.
- Optionally, spray vinegar on the sides of the bowl and under the rim.
The acidity will start loosening the hard water deposits.
Step 3: Add Baking Soda
- Sprinkle ½ cup of baking soda around the bowl.
- Add another 1 cup of vinegar to trigger a fizzing reaction.
- Allow the mixture to sit for 10–15 minutes, letting the reaction work on the stains.