We all have a favourite mug or cup for our espresso and making use of it usually can leave it with brown stains inside. The Unpleasant stains comprise oils that make espresso style bitter. Make use of the Light abrasive action of baking soda to get rid of the stains. https://social-bookmarking.org/en/the-ultimate-guide-to-office-cleaning-keeping-your-workspace-pristine-and-productive