Day 74: Using Vinegar to Remove Hard Water Spots on Shower Doors (fail).

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After cleaning the soap scum off our glass shower doors, we still had white, hard water spots on the doors.

Per the article instructions, I sprayed undiluted vinegar onto the glass shower doors, let it sit for awhile, and then dipped a hard bristle sponge in additional vinegar to scrub the glass.  Although it definitely helped to clean the glass, the hard water spots are still very evident.

Verdict: FAIL.