Other than your toilet, the bathtub might be the most challenging area of the bathroom to clean. This is because the bathtub can build up quite a few bad stains over time and over many uses per day. One common stain that you might find in your bathtub is mildew. To clean these stains, you will need specific cleaning supplies and techniques.
Turn on the faucet and get your bathtub wet before you start cleaning. Have a spray bottle filled with water to continue to wet down areas as you clean.
Mix together ¾ cup of detergent for every gallon of water in a bucket.
Pour the cleaning solution onto the stained areas of the bathtub, and let it sit for approximately 15 minutes.
Use a scrub brush to scrub the surface, cleaning small areas at a time.
Spray water on the detergent to rinse it away. If you still see some of the stains, add more detergent and continue scrubbing.
Pour baking soda onto any remaining stains. Mix with a small amount of water to make a paste.
Use your scrub brush to work the paste into the stain to remove it. Rinse with water once the stain's gone.