Gets off the Hard Water Stains and Build-up
I really like this product.  I have used it to remove hard water build-up from sinks, drinking fountains and windows.  Sometimes the heavier build-up needs a bit of gentle scrubbing and a couple of applications.  I like that it bubbles up like hydrogen peroxide when it hits the hard water spots because it makes it easy to tell when they are gone.  It does have a strong odor/smell to it and using a lot in an enclosed area will probably make you cough, but I've smelled worse/stronger ones and this one it's too bad.  Very happy with the purchase.
Rating: 5 stars