Hard Water Removal
Here are some tips on how to use vinegar to get rid of hard water stains:
To clean faucets: Soak some paper towels in vinegar and place them on the areas that are caked with hard water stains. Fill a spray bottle with vinegar and spray the towels every couple of minutes. After 20-30 minutes, take the towels off and scrub off the hard water with an old toothbrush. For areas with thick hard water, repeat the process, waiting one hour, keeping the towels soaked with vinegar. You shouldn’t have to scrub really hard, the hard water will come off easily after soaking in vinegar.
Warning: Do not use vinegar on marble counter tops or other stoneware, as it can cause the stone to pit and corrode.
You can also use vinegar on shower heads to unclog all of the holes. Most shower heads detach from the base and can easily be soaked in a bucket. If the shower head is attached, simply fill a plastic bag with vinegar and tie it around the shower-head.