We always prefer natural approach for cleaning our environment. There are a lot of commercial products that will guarantee to do a better job than the one you already use. The true is that they are full of toxins and chemicals which can cause allergies, irritation and all sorts of problems.
When it comes to clogged and scaled shower head, we have the best solution which is toxins-free! I had the same problem. My shower were spraying in a million different direction, making a total mess in my bathroom. I was also wondering if would be possible to get my old, rusty shower head to work again.
When your shower head is clogged, it means that half of those little spray-jets are clogged while the other half is spraying in all directions due to the lime deposits.
You just need a large ziplock bag and filled it half way with white vinegar. Put the bag over the shower head. Please make sure that the front of the shower head is dipped in the vinegar. Then, you should tied hair elastic around to hold the bag. Leave the vinegar to stay for several hours.
If your shower head is pretty clogged, you might need to scrub a bit around the holes. Scrubbing will help to get all the mineral deposits out.
Now, you would have a brand new shower. You will be amazed from the result!