I used to soak my mitts in a bucket of water for about two days. Then I'd put a couple of baseballs in the pocket and wrap it up with a rubber band. Today you don't have to do that, because catchers' mitts are more like first baseman's gloves. ↗
I've figured out what to do so far, but it's always the next thing you come to where the man with the bucket of ice cold water is waiting - whoosh! in your face. That's why you work with directors who know what to tell you to do. ↗