You will need:
Distilled vinegar
An old cloth or rag
A green and yellow sponge
Instructions:
1. Soak the cloth or rag in vinegar.
2. Wrap or lay the rag on the hard water marks for about an hour.
3. After the time is up, remove the rag and use the sponge to gently scrub the spots.
4. Repeat this step for very old or stubborn water stains if necessary.
5. And that’s it! Your sinks and faucets will be looking new again in no time. This method also works for water stains on porcelain sinks and tile.