The Works Toilet Bowl Cleaner, 32 Oz. 03310
Product Review (submitted on April 7, 2013):
I had no sucess with cleaning the hard water stains uilding up inn my toilets bowls lately. Typical stuff didn't work and the buildup remained. I tried this product in desperation. I was taken back by just how quickly it disolved and loosened the stains ! It was fantastic ! And it was SO EASY !! I would highly suggest this product.