Bathtub stains can come from a variety of sources. Rust and hard water stains are common in homes with well water. Mineral stains of blue and green can occur around the spout of the tub. Soap scum and build-up from shampoo and body washes can stain tubs. More difficult stains like hair dye can be especially difficult to remove. There is a method for removing even the most stubborn stains from your bathtub.
Sprinkle an even layer of baking soda on the entire tub surface. Fill the spray bottle with water and spray the baking soda until it forms a wet paste. Scrub the baking soda with the scrub brush in a circular motion until you've scrubbed the entire surface of the tub. Turn on the shower to rinse off the baking soda.
Examine any remaining stains. Blue or green stains are mineral deposits from the water. Squirt the enamel cleaner on any blue or green stains and let it sit for five minutes. Wipe off with a dry cloth and rinse the area with clean water.
Look for rust stains, which appear as orange or brown. Pour white vinegar directly on the rust stains until completely covered. Let the vinegar sit for an hour. Lightly scrub the stains with the scrub brush until they come up. Rinse the rust particles down the shower drain with the showerhead.
Examine the tub for any more stubborn stains. Pour 1/4 cup of powdered dishwashing liquid into a large cup. Pour enough water in the cup to make a pasty mixture and stir with a wooden spoon. Spoon the paste directly onto any remaining stains. Scrub the paste into the stain gently with the scrub brush. Let the paste sit for 20 minutes and rinse off with clean water.