Bests & Worsts Reviews from Amazon

Works well but this a very expensive way to go. All you need to dissolve the scale is a mild acid. We used to use vinegar, which works well but smells like vinegar. Some people report some corosion, though we used it on our old Zoji hot pot for about 7 years without noticing any corrosion. Perhaps it's because we only descaled it twice a year. Add a glass jar to the inside and you use a lot less (Think of how you displace water when you get in the tub) You can also save the vinegar to use again later, though white vinegar in bulk is quite inexpensive. This product is 100% Citric acid which doesn't smell, however for the same price here on Amazon you can buy almost 10 times as much if you buy food grade (Citric acid is used for lots of things including cooking.) We also use Citric acid in our dishwasher as the newer non phosphate detergents are much more susceptible to hard water deposits. Two tablespoons are about the right amount for each cleaning cycle Citric Acid - 1 lb., (Frontier) Citric Acid, priced per pound Citric Acid 4 Lb tub Citric Acid (Lemon Salt) 5 Pounds Bulk Citric Acid 1 Lb tub