Get Prepared to Clean the Fireplace

• 1). Put down a layer of plastic sheeting and then cover that with newsprint.
  
  
• 2). Clean the inside of the fireplace and remove any ashes.
  
  
• 3). Remove the fireplace screen, andirons and any other decorative objects.
  
  
• 4). Cover nearby carpeting, furniture and draperies. Brushing can spray specks of soot long distances.
  
  
• 5). Open the windows and fireplace flue to make sure that the area is well ventilated.
  
  

Scrub Brick With Mild Abrasives

• 1). Make a mixture of equal parts dishwashing liquid and baking soda or salt.
  
  
• 2). Rub the paste onto the discolored brick surface with a cloth, making sure to get it onto the mortar and in all the crevices. Be generous.
  
  
• 3). Allow the mixture to dry completely to give it time to draw out some of the soot.
  
  
• 4). Brush it off in long strokes that blend into the surrounding brick. Consider this as a first and last step. The baking soda will help neutralize any acidic cleansers you may have to use.
  
  
• 5). Rinse with warm water.
  
  

Scrub with TSP

• 1). Mix trisodium phosphate (TSP) cleanser with water according to the manufacturer's instructions. TSP can be caustic; it's a powerful cleaner, so wear gloves and eye gear.
  
  
• 2). Brush TSP on the brick and scrub with a stiff brush.
  
  
• 3). Allow the area to dry between applications.
  
  
• 4). Evaluate any remaining discoloration. You can apply TSP more than once and increase the concentration if you have to.
  
  
• 5). Clean the spot thoroughly with water.