For liquid stains: blot the stain gently with a high-absorbent material (cotton cloth or paper towel).
Pat dry the area gently to remove any remaining humidity. If the stain persists, use a cloth with small amount of mild detergent (soap) to remove the stain, rubbing very gently in circular motion.
Ball-point pen stains: use a clean cotton cloth with a small amount of soap to rub off the stain gently. Clean the surface with a fresh dumb cloth and leave the fabric to dry.
Alternatively, you may use baby wipes.
Alcohol derivatives, petroleum and alkali-based solvents should not be used.