What You Need
1/4 cup coarse kosher salt
1. Halve Grapefruit: 1 medium to large grapefruit will clean your entire bath or shower from top to bottom, including all the fixtures. Simply cut it in half with a knife and you’ll be all set.
2. Sprinkle With Salt: Using 1 grapefruit half at a time, sprinkle the top liberally with salt. Wet your bathtub and sprinkle the remaining salt around the bottom.
3. Get to scrubbing! Scrub your grapefruit around your shower or tub, making sure to slightly “juice” the citrus over each fixture and lifting it every few seconds to pick up fresh salt from around the tub instead of just pushing it around. You can also use the rind on stubborn areas.
4. Rinse: When all is said and done, simply rinse away the pulpy bits and the salt and your shower is as good as new.