get a new gi if it really bothers you, if not try bleaching it to make the whole thing yellow. ( just tell your sensei you didn't know that would hap...

get a new gi if it really bothers you, if not try bleaching it to make the whole thing yellow. ( just tell your sensei you didn’t know that would happen, and that you don’t have enough money for a new gi, this way when you do buy another gi, just use that one for competitions, while your old gi for class)

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Previous comment: "try vinegar or baking soda."