Calcium deposits on shower heads create a white crusty residue that not only looks nasty, it can clog the head too. If you are experiencing decreased water pressure from your shower, check the head for a build-up of calcium deposits. There is no need to go the expense of replacing the shower head. You can remove this icky build-up with plain old white vinegar and a plastic bag.
Remove the shower head by unscrewing it from th base. If it turns freely and comes off easily, the job of cleaning the head will be much easier, but do not despair if the head seems to be locked in place. This is probably due to calcium deposits and will need to be treated in place.
Clean a head that has been removed from the shower base by covering it with plain white vinegar and allowing it to sit for 20 minutes.The acid in the vinegar will soften the calcium deposits making it easy to remove with a soft brush. Clean and rinse with cold water. Reassemble the shower head and turn on the shower. You should see a noticeable increase in water pressure.
Clean shower heads that appear to be locked in place by filling a plastic storage bag with white vinegar and placing the bag of vinegar over the shower head. Secure in place with a heavy duty elastic band and let it rest for 20 minutes.
Remove the plastic bag and scrub the shower head with a soft bristled brush to remove any remaining residue. An old electric toothbrush works great!
Rinse the shower head with clear water.
Repeat the process to remove any stubborn areas, if needed.
Turn on the shower to test for increased water pressure.