I need to season the bag on the set of Pettigrews I picked up. It's the first time I've ever done it, and I have a question.

I'd swear I heard the pipe sergeant in my band say to rinse it out first with water and a little bit of a mild soap and let it dry before seasoning it. However, every article that I can find online doesn't say anything about that.

XMTS Pipers, what say you?