Removing mineral deposits

Hard water means the water has a high mineral content (e.g. calcium,magnesium, iron, etc.). This often results in whitish mineral deposits left onfaucets, shower doors, drains, windows. Vinegar, a weak acid, can dissolve manyof these deposits. Remove mineral deposits around faucets, cover deposits withstrips of paper towels, soaked in vinegar. Let set for 1 hour and clean. --from the U.S. Environmental Protection Agency