Repel wins best soap scum remover!
cleans glass, acrylic, and fiberglass shower doors with ease. It quickly dissolves soap scum, hard water spots, and calcium deposits, plus mold, mildew, oily skincare products, smudges, fingerprints, and other grimy residues.
Not only that, but it coats your shower door with an invisible protective layer to repel water spots and prevent soap scum from accumulating to match the metallic sleekness of your recently upgraded bathroom faucets or freshness of the new bathroom wall paint job. It works great on mirrors, windows, counters, and bathroom tile, too.
https://www.thespruce.com/best-cleaners-for-glass-shower-doors-4177690