I adapted this recipe from Crunchy Betty and I love it! It cleans everything in my bathroom and in other parts of he house as well, and is so cheap to make.
DIY Bathroom Scrub Recipe
Pour all dry ingredients into a wide-mouth glass jar. (I find that a salsa jar usually works best for this). Next add the essential oils and mix until well blended. (The mixture will be a bit crumbly at this point). Then add the vinegar and water and mix the ingredients until creamy. The vinegar will react with the baking soda and fizz a bit, but it’s completely harmless.
How to Use:
Scoop out a tablespoon of the cream and scrub on tile with a wet a Skoy cloth or microfiber cloth. Rinse with another wet cloth, and wipe dry. I use this on my shower tile, in the fiberglass tub, the porcelain sink and the marble countertop. I only need a scoop for the sink 2 for the shower and three for the tub. It works great o the soap scum on my glass shower door along with my Glass Cleaner . I also use it to clean the toilet bowl. A little goes a long way.
Try it out, and let me know how you like it! (you may need to add more water and/or soap to get the consistency right)