Well, one does not need hair gel to get their hair to stick up.
Natural hair oil can build up without modern shampoo. If you ever went a few days without washing your hair you might notice that it sticks in whatever position you put it in.
One does not need a modern product to make their hair stick up. As plants can be milked for their sticky substances, im sure a goblin might stumble on a way to make his hair stick up.
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