Most chemicals can etch or wear down alabaster because it's a soft mineral. Use plain water to restore the smooth, lustrous appearance of your alabaster lamps.
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Turn off and unplug the lamp.
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Dampen a soft cloth with water and wring it out.
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Wipe the alabaster lamp gently with the cloth to remove any residue or dirt. Rinse the cloth as needed.
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Dry the alabaster with a clean, dry cloth.