If your shower only delivers a trickle of water, you may need to clean the shower head. Water, even from a municipal system, contains minerals that build up and block the openings in the shower head. And, if you live in an area with hard water or use well water, the problem can be even worse.
Installing a good shower filter can help reduce mineral deposits and contaminants. But once the openings, or nozzles, become blocked, the shower head is a dark, moist, warm place for bacteria and mold to grow. Gross! It's time to learn how to clean your shower head as effectively as possible.
Know more- https://www.realsimple.com/home-organizing/cleaning/cleaning-bathroom/how-to-clean-a-shower-head