After spending almost $14,000 on a bathroom remodel, we were so dismayed to see waterspots on the glass shower enclosure that we paid an additional $175 to have a protective sheeting coat placed to stop spotting and reduce cleaning time to virtually nil--so the installer said!! Funny thing--he left us with a complimentary bottle of EDFRED! After finding I had negated the warranty on the "special coating" because I tried commercial cleaning products to remove the rapidly accumulating blobs instead of just "buffing the glass with a lintfree cloth after every shower" (WHO has time for THAT????) I found EDFRED under the sink--NO WONDER the installer left it for us--he KNEW what was going to happen! Miracle Product! I use it for everything in my bathrooms except soaking my dentures!! (And I've almost considered that...)