How to get out hard crusty hairspray/hair oil off recliner head area

I have a recliner where I have cleaned the area of the headrest. What can I do to get the area soft again? I've tried several upholstery products and trying to brush, it's crusty hard with a darker tint than rest of the chair. Great chair just have had a while. The material is kind of a rounded corduroy Any suggestions?

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