1. Gather necessary tools: Before starting the process, ensure that you have these essential tools – an adjustable wrench, clean rags or towels, plumber’s tape, and a new shower head if you’re replacing the old one.

2. Turn off the water supply: Locate the water supply valve for your shower and turn it off to prevent water from flowing while you’re working on removing the shower head.

3. Protect the shower fixture: Wrap a clean rag or towel around the connection point between the shower arm and shower head. This will help protect the fixture from any accidental scratches or damage while using the adjustable wrench.

4. Loosen the shower head: Using your adjustable wrench, gently grip the base of the shower head where it connects to the shower arm (covered with a towel or rag). Turn counterclockwise to loosen the connection.

5. Remove with hands: Once you’ve loosened the shower head with the wrench, use your hands to remove it by twisting counterclockwise until it detaches completely from the shower arm.

6. Clean off debris and mineral deposits: Examine the threads on both the shower head and arm for any debris or mineral buildup. Remove any visible deposits with a small brush or cloth.

7. Soak in vinegar (optional): If there’s significant mineral buildup on your shower head, you can soak it in equal parts white vinegar and water for an hour to remove stubborn deposits.

8. Rinse and dry: After cleaning or soaking, rinse off any leftover debris from both parts under running water and dry them thoroughly with a clean towel.

9. Apply plumber’s tape: Wrap 2-3 layers of plumber’s tape around the threads of the shower arm in a clockwise direction to create a watertight seal when installing your new or cleaned shower head.

10. Attach new or cleaned shower head: Hold the shower head in place and twist it onto the shower arm clockwise by hand. Make sure it’s securely fastened, but do not overtighten.

11. Tighten with wrench: Use your adjustable wrench to tighten the connection between the shower head and arm, making sure not to scratch the fixtures by having the towel or rag in place.

12. Test for leaks: Turn on the water supply valve and check for any leakage around the connection point. If any water is dripping, turn off the supply and slightly tighten the connection with your wrench until the leak stops.

Congratulations! You have successfully removed and installed a shower head following these 12 simple steps. Now enjoy a refreshing shower experience with your new or cleaned shower head.