Product review (4 stars): Helps with hard water stains
Our glasses were coming out with a terrible film. We'd given up hope until I saw this. It hasn't totally solved the issue, but it's >80% better, and that's saying a lot. The only real negative is the white canister for some reason started leaking where the top screws on after a while, water had leaked everywhere by the time we noticed, took it off and back on again, now it seems ok, but I'm not sure I trust it just yet so a pan is under it. Hopefully just an O-ring got twisted or something.