Goof off is a heavy-duty stain and spot remover that works well on gum. It's available at most hardware stores. There is a product called Goo Gone that also works very well and washes easily out of clothing. You can get it at most grocery, drug, or department stores, or online. Alternately, use a similar, but unwanted, fabric to check whether Goof Off removes color. Immediately scrape with a butter knife. You may have to squirt a little more Goof Off onto the gum residue in order to remove completely.

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Write a summary of the previous text in Chinese:
使用去胶剂。 在不显眼的位置喷些去胶剂，确定它是否会让衣服退色。 在口香糖上喷些去胶剂。 用纸巾将剩下的口香糖除去。 把衣服放在外面让去胶剂蒸发。