Simply rinse your caul fat in cold water, and, if there is still a smell, soak it in more cold water with a little citrus, vinegar or vanilla extract
This warm water soak is especially important for any of you working with caul fat from bovids or cervids, meaning all the cow, sheep, goat, deer or elk type animals.
This stuff has been so valuable to so many people for so long because of how caul fat works to preserve moisture in otherwise dry meats (and even fish), acts as a wrapper for things like meatballs and sausages, and, more recently, to stick food to other food — typically, say, ground meat or a mousse to the outside of a solid piece of meat.
You want to lay out the sheets of fat in large areas, place whatever is going to be wrapped on them, then use the knife to cut pieces to shape.