You climb into the shower and notice that the stream reminds you of a gentle rain, awe so soothing. Wait a second the shower is set to have a wide pattern with enough pressure to blow off all the dirt. When your shower head gets plugged up with a ton of mineral deposit it will barely work, I suppose if you are on a diet and you need to loose a little weight leave it alone because you will have to run around the shower stall to get wet.
Take a quart storage bag and put 1/4 of a cup of baking soda and 1 cup of vinegar and loosely fasten the bag around the shower head. Make sure not to completely seal the bag so that the gas that it creates has a place to go (remember the baking soda volcano in school). Let this bubbly solution set on the shower head for one hour. Remove the bag, turn on your shower to blow out any of the remaining solution. Your shower head should be back to its original self.