My communications with this business have been very positive; they've always been pleasant and courteous. The product unfortunately was not suitable for my shower screen. When I bought my house 2 1/2 years ago the screen was cloudy and streaked. I had tried all the usual cleaners without success, then thought I'd have one last try with Glass Hero. It worked to the extent the glass now feels smoother, but I suspect the glass has previously been neglected to the degree that it is now porous an...