All of us have a favourite mug or cup for our espresso and applying it frequently can go away it with brown stains inside of. The unsightly stains consist of oils which make coffee taste bitter. Use the Mild abrasive motion 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