Things You Will Need
Table Salt
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Mix 1 oz. of liquid soap with 1 oz. table salt. Place drops of water into the mixture until it forms a thick cream.
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Spread the salt mixture over the soot on the brick with a sponge. Allow the mixture to remain on the brick for 10 minutes.
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Scrub the brick with a wet, stiff bristle brush, removing the soot stains.
All-Purpose Cleaner
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Spray water onto the soot on the brick fireplace with a spray bottle.
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Mix 1/4 cup all purpose cleaner into a gallon of water.
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Dip a stiff bristle brush into the cleaning mixture and scrub the soot stains.
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Wet a clean cloth and wipe over the brick, removing the soot and soapy residue from the brick.
Trisodium Phosphate
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Fill a gallon bucket with hot water. Pour 1/2 cup of trisodium phosphate into the water and stir to dissolve.
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Wet a stiff bristle brush with the cleaning mixture. Apply the mixture to the soot on the brick, scrubbing the area clean.
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Rinse the soot and cleaning mixture from the brick with a sponge and warm water. This is an acid solution and can be harmful to skin and other objects.