It works...
This product is for use on safety glass like clear shower doors and vehicle glass.  A previous reviewer mistakenly associated his review of Sunny Brite Classic with this product, Sunny Brite II.  Sunny Brite Classic can damage safety glass, which is why its label reads, in part, &#34;DO NOT USE ON TEMPERED SAFETY GLASS such as vehicle glass, clear shower doors, patio doors, ...&#34;<br />Anyway, I use this on my clear shower doors and it removes all the hard water stains.  I wet the door, use a damp sponge and a circular motion and everything comes off.
Rating: 5 stars