Shower head
Over time, the shower head nozzles can become clogged. Depending on the quality of your water, you may find hard water deposits or other build-up that needs to be removed.
To clean the shower head while it is in place, use an old toothbrush and a gentle cleaning solution. If you can easily remove the head, you can go for a deeper soak in a gentle cleaner for about an hour. Then screw it back onto the pipe and run the shower for a minute to rinse.