If you aren’t getting enough shower power, it may be that mineral deposits (hard-water buildup) are clogging the showerhead.
If the showerhead is not all metal—or if you cannot detach it from the pipe—pour about 1 cup of distilled white vinegar into a small, leak-proof plastic bag. Put the bag over the showerhead and secure it in place with a thick rubber band or piece of string. Let it stand overnight. In the morning, remove the bag, scrub the head with an old toothbrush, rinse with clean water and enjoy your power shower.
