The Faucet Flow Looks Different
Have you checked your aerator? More often than not the screen that is there to collect gunk in your water supply has done just that, collected gunk.
Many aerators come off by hand, and if not with the simple twist of a wrench (slide cardboard into the teeth of your wrench to avoid scratching your fixture). Wash the screen off and replace. Now go out to lunch with the money you saved!
