[lawgolfer]

The build-up on your shower head and faucets is the result of hard water. Hard water also creates "soap scum". Solve the problem at its source and install a simple water softener. The Nova filter, or any similar canister filtering system, does not soften the water but removes sediment, odors (chlorine), and some metals. Nova sells, and installs, the softener and filters as a package for a not unreasonable price. However, you can save a few dollars at Home Depot or Lowes.

Keep in mind that the build-up you are complaining about, as well as "soap scum" , is also in your hair, over your body, and in your clothes. With softened water, your skin will feel softer, your laundry will be cleaner, you will use less soap, and there will be no build-up on your shower heads, faucets, and inside the water pipes in your house.