I have a plastic showerhead in my guest bathroom. I haven't replaced it with anything better because, well, I never use it. I did notice that only about two-thirds of the jets were spraying water when I went to clean the bathroom last week. After a quick view of the showerhead it was clear that my problem was hard water build-up. The easiest way to remove hard water build-up is to first remove the showerhead. You should be able to do this with your bare hands as most plastic showerheads use a simple o-ring instead of tephlon tape to make sure the head doesn't leak. Always support the neck when taking the head off, you don't need to turn a simple cleaning project into an all-day plumbing project! Next, fill a small bowl with 1 pint white vinegar and 1 pint hot water. Soak the showerhead in the vinegar-water solution for at least 1 hour. Finally, rinse the showerhead thoroughly and replace it in your shower. Repeat the process if necessary.
