Hard water stains are very unsightly and often extremely difficult to clean. There are several household products that can effectively remove hard water stains in the toilet without the use of harsh chemicals.: Baking Soda and Vinegar
Magic Eraser: cut a piece off and float it in your toilet overnight and no more toilet ring -clean window screens when they are still in the window- The website has a list of about 100 uses! Gonna try em! I do love my magic erasers!