Cleaning the bathtub – list shows the best home remedies. Citric acid is also ideal for descaling the tub.
Clean the tub until it's sparkling clean with buttermilk and vinegar. Clean with baking soda, laundry detergent and dish soap. Dry the tub dry with a soft cloth to prevent limescale and soap residue and make the next cleaning session less strenuous. If you don't use your bathtub at all because you have a separate shower, you can at least be annoyed by dust deposits.