Hard water stains that are commonly found on shower doors are best treated with lemon juice that can be applied to a sponge. Use a paste that consists of vinegar and baking soda to remove hard water stains from shower doors with help from a professional house cleaner in this free video on hard water stains and housekeeping tips. Expert: Rachel Yatuzis Contact: www.greenkleeninc.com Bio: Rachel Yatuzis is a professional house cleaner in Nashville, Tenn., specializing in using everyday household items for cleaning purposes. Filmmaker: Tim Brown Series Description: In order to remove coffee stains, all that is needed is water and an egg that should be applied to the stain with a sponge. Use a scrub brush to help get out a coffee stain with help from a professional house cleaner in this free video series housekeeping tips.