Tub Cleaner - vinegar and dish soap, no scrubbing! Heat 1/2C white vinegar in m'wave for 90 sec, pour int spray bottle. Add 1/2C BLUE Dawn dish soap. Shake gently to mix. Spray on surface, let it sit 1-2 hours. Just wipe it away then rinse with water. Should also take soap scum off shower doors!
Awesome Cleaning Slime am 1 tablespoons of white (Elmers) glue. Add about 1 spoon full of water. Mix. Then in another cup put 2 tablespoons of borax and 2 tablespoons of water. Pour the glue solution and the borax solution together and you get slime. Add some food color to the glue first if you want a cool color.
You may consider your bathtub a sanctuary, but when the tub is covered in stains of some sort, it can quickly change how you feel. Mineral deposit buildup, hard water, and mold are only a few causes of old stains, but you do not have to fret about removing them. Gather your supplies and get to work.