Second time buying
The product lasted me for a while.  I moved into a house with hard water (I have since put in a water softener!).  The shower doors are actually etched with water - they constantly look &#34;water spotted&#34;.  The sinks not so nice either.  SB2 made the sinks shiny like new and really lessened the shower doors.  Based on an internet recommendation, I used a sponge (the type for no stick pans) and a small hand sander for doing large areas.  It even worked on my tile!
Rating: 5 stars