Review (5/5): Save your Keurig coffee maker with this product!
We have exceptionally hard water. I went through two Keurig coffee makers before finding these little de-scalers. The scale build up was so bad, the vinegar rinse wouldn't work. I now keep one of these in the water storage container of my kuerig coffee maker and can visibly see the difference - no more hard water lines. I'm thinking about placing one of these in the toilet tank as well to prevent the hard water stain in the toilet bowl. I will let you know if it works!