First, the most effective way is to rinse with water: the silicone sleeve with grease should be coated with soapy water, wipe the stain with a soft cloth, and then wash it with water. Dry the water with a napkin or a soft cloth and leave in a cool, ventilated place to dry. Note: 1. Avoid sun exposure. 2. Don't wash too often. Two, wipe with an eraser. Third, use alcohol, or apply some toothpaste to clean. (Less use) Four, use transparent tape or tape.