What cleans white chalky stuff specifically stuck to the walls of showers , and other residues such as these?

Something that will do this that you can find around the house, or perhaps something from a store, some product created for this.
Any home made remedies that work okay?

Answers:    Lime remover or also called CLR. Home Depot.
The white chalky deposit is within fact lime clamber. A few drops of white vinegar on a damp cloth or sponge will wipe it away. For crusted scale around tap, tie a vinegar soaked rag around the crusted nouns and leave overnight.
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