I started using Comet spray after replacing one shower door because it was
recommended by the maker. It worked pretty well on the old door in the other
bathroom, but I found that after I cleaned the old door - the aluminum would be
shiny but after a few minutes, the glass looked pretty much the same as before
cleaning. This happened with everything I tried. The Comet worked the best
overall. I tried CLR, Lime Away and plain white vinegar and none of them did a
very good job on the glass.

Dorothy