Haley's Hints Remove Hard Water Stains on Sinks and Bathtubs CuprockDIY 2021-02-04 #haleyshints #cuprockdiy #homehacks Remove Hard Water Stains on Sinks and Bathtubs. Hard water stains can be tough remove but we’ve a great tip to remove hard water stains from quick and easy. PBS-TV’s GardenRx show you how to know when your lawn and garden has had enough to drink. Like this:Like Loading... Related