Using raw flour paste:
Steps: Mix a small amount of raw flour with cold water to form a paste, then apply it to the oil stain. After a few hours, brush off the powder with a wet brush; the oil stain will be removed.
Using a mixture of soap and gasoline:
Steps: Prepare a waterless mixture of soap and gasoline. Soak or apply it to the oil stain, gently rubbing to dissolve and remove the oil. Then wash with soapy water and rinse thoroughly with clean water.
Using toothpaste:
Steps: Squeeze a small amount of toothpaste onto the oil stain, gently rub several times, then wash with clean water to remove the oil stain.
Using dish soap:
Steps: Apply a few drops of dish soap to the oil stain, then gently rub, and finally wash with clean water.
Precautions: When cleaning a sun umbrella, it is recommended to first test it on a small, inconspicuous area to ensure that the chosen method will not damage the umbrella material. Also, ensure the sun umbrella is completely dry after cleaning to prevent mold or damage.