Mineral and calcium deposits can build up in a rubber showerhead, affecting the water pressure. A clogged showerhead can spurt water in all different directions. Cleaning a rubber showerhead will remove any hard water deposits and calcium build-up, allowing water to stream evenly and with constant pressure. Vinegar and water are the only cleaning solutions you need to clean a rubber showerhead; avoid harsh chemicals, heavy-duty cleaners and abrasives.
Twist the showerhead counterclockwise to unscrew it from the shower arm. If the showerhead is difficult to remove, wrap a towel around it, and then loosen it with pliers.
Make a solution of one part white vinegar and one part water in a bowl. Place the face of the rubber shower head in the solution, and allow it to soak overnight.
Scrub off mineral and calcium deposits with an old toothbrush. Inspect the holes in the showerhead for clogged dirt or hard water deposits. If the holes are clogged, poke a thin wire into them to remove the residue.
Rinse off the showerhead thoroughly with water, and then dry with a soft, clean cloth. Twist the showerhead clockwise onto the shower arm.
If you cannot remove the showerhead, fill a small plastic bag with 2 to 3 inches of white vinegar, and then attach the bag to the showerhead with a rubber band.