You know your shower isn't functioning properly when it spurts and sputters, or your forced to rinse yourself with a minimal trickle.
The traditional technique is to unscrew the showerhead, and soak in CLR for a few minutes, then scrub away any buildup with a toothbrush, as suggested in this tip from Real Simple.
But, to avoid the drama of removing your showerhead, simply fill a plastic sandwich bag with white vinegar, and tape it around the showerhead. Leave it overnight, then scrub away with a toothbrush in the morning.
Photo: Jupiter Images.