Recently found this cleaner for hard water stains, and found out

3 Ways to Remove Hard Water Stains from Shower Doors - wikiHow

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CleanStone Hardwater Stain Cleaning Kit — Atlas Preservation

Gets Rust Off

Brite & Clean BW2SCS2 BriteWipes Ultimate Hard Water Stain Remover - Pack of 2, 1 - Kroger

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I tried a TikTok cleaning hack that just uses parchment paper to clean hard water stains — and it actually works

Marble Cleaner: Remove Soap Scum & Hard Water Stains

No matter how many years the stains have been building up, Diamond Shine hard water cleaner completely eliminates and removes the stains, like they were never there. Diamond Shine hard water cleaner can clean windows, automotive glass, shower doors, chrome fittings, brass components, tiles, porcelain fixtures, bronze, brass, copper, tile, and all surfaces made of aluminum and stainless steel. Treatment for mild to severe hard water stains. Treat and seal surfaces that look foggy and hazed.

Diamond Shine Professional Hard Water Spot and Stain Cleaner 10 Ounces Hard Water Stain Remover

Don Aslett Showers And Stuff Cleaner 2 Pack – Professional Strength Ha

Bio Clean, 40oz, (1) (85-703): Bio Clean Stain Remover