Problem scenario
You find a showerhead with black build-up or gunk. You want the spouts to be clean. It may look like this:
You want to remove the black flecks from inside. What should you do to clean the inside of the showerhead?
Solution
1. Get a dishwashing brush, a bottle brush, or a toothbrush with long bristles.
2. Get some bleach.
3. Pour the bleach on the bristles of the brush.
4. Brush inside to get the black stuff out of the showerhead.