I'm not getting pressure like I used to. You need to clean out your nozzles!
A blocked nozzle reduces the overall water pressure. It affects the flow rate because clogged nozzles causes less water passing through them. That means the water pressure inside builds up, but not enough water is coming out – causing you to feel less pressure at the output. Follow the directions here to clean out the nozzles: Troubleshooting Clogged Nozzles & Surface Cleaners That Stopped Spinning
Need a nozzle cleaning tool?
You can purchase the nozzle cleaner here: Nozzle Cleaning Tool for Surface Cleaner Nozzles - SurfaceMaxx.