How to Remove Hard Water Stains in Tubs

1). Mix the white vinegar and lemon juice in a cup. Soak a terry cloth in the solution, then rub the cloth over the hard water stains.
2). Rinse the area with water and dry with a clean cloth. If the stain hasn't been removed, use a spoon to mix white vinegar and baking soda in a bowl to form a paste.
3). Apply a thick layer of the paste over the stains with a rag. Keep the paste on the stains for an hour to make sure the paste is being absorbed by the stains.
4). Soak a sponge in water, and wipe the paste off the tub with the sponge. Rinse the remaining paste off with water, then dry the tub with the clean cloth.