Take a gallon bag and add the baking soda. I also included a picture of the small bungee cord I used for tying my bag to the shower head in case you weren't sure what I meant by "bungee cord."
Next, add the vinegar and the lemon juice to the baking soda.
Then take the filled bag and the bungee cord or rubber band and secure it to your shower head.
Allow the shower head to soak in the solution for 3-4 hours. At about the 2-hour mark, place your hand against the bag and actually "scrub" the shower head.
After the time is up, remove the bag. Fill a small bowl with warm water and lift the bowl up to the shower head and immerse the shower head in the water to rinse off the baking soda residue from the solution.
You can use your hand to splash the water around and "scrub" the shower head a bit to get it clean.
If any buildup remains, use your scrub brush to loosen it and rinse with water again. After taking these simple steps, you should see a pretty, shiny, shower head.
Notes
Choose Environmentally-Friendly Cleaners: Baking soda, vinegar, and lemon juice are effective and eco-friendly cleaning agents that can help remove mineral deposits and grime from your shower head. They're also safe for the environment, and they won't leave behind harsh chemical residues that could be harmful to your skin or the environment.
Secure the Bag Properly: Ensure the gallon bag is securely fastened to the shower head using a large rubber band or bungee cord to prevent any leaks or spills during the cleaning process. Double-check the seal to avoid any solution dripping onto the shower floor or walls, which could potentially cause damage or stains.
Thoroughly Rinse and Scrub: After soaking the shower head in the cleaning solution, thoroughly rinse it with warm water to remove any remaining residue. Use a scrub brush or toothbrush to gently loosen any stubborn buildup, focusing on crevices and hard-to-reach areas. This ensures your shower head is not only clean but also free from any lingering cleaning solution that could affect water quality or leave behind a residue.