Well, I just bought a Bruno Delgrange saddle, which came with glycerine saddle soap, a sponge, and oil. I love my saddle and I wouldn't want to damage it by using the cleaner incorrectly. All it says is to apply the soap with a soft, humid sponge. So do I rinse off the soap after I use it? I've heard different things. If yes, then how can I do it without damaging the saddle?