Things You Will Need
In addition to their unsightly appearance, stained covers may be greasy to the touch. While fresh oil is simply wiped up, old stains require a more intensive removal approach.
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Sprinkle a solvent, such as mineral spirits or naphtha lighter fluid, onto the stained area of the book cover. Allow it to saturate the cooking oil for three to five minutes.
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Blot the cover with a soft cloth to soak up any excess solvent and loosened oil.
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Squirt several drops of a grease-cutting dish soap onto the remaining cooking oil and let it set for three to five minutes.
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Wipe the area clean with a moist cloth.
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Repeat Step 3 and rub the stain gently if oil remains.