Lemon to Remove Hard Water spots

Another lemon idea, this time for cleaning the hard water spots off of your fixtures.  This one worked a little bit but still left a lot of water spots on the fixture that I needed to follow up with my usual cleaner to get rid of all of the water stains.  Plus, I do not usually have fresh lemons around, I only buy them when I need one, so this one was not practical for me either.

RESULTS
PINS DOWN
***-ease
*-effectiveness
***-cost
*-time
*-practical