Cue the oohs and ahhs! Not only is this a cheap solution, but it's very eco-friendly! I used the vinegar to get the hard water stains out of the toilet, but thankfully for you (it looked pretty gross), the photos didn't come out so good due to my ancient camera. To remove the hard water deposits, pour a quart or so of white vinegar in the toilet and let it sit for an hour or so. They will magically disappear! This also works great of teapots and coffee makers.