First, how old is he? It probably just is what it is you know? I use Pet Silk with gobs of conditioner on my Bernie. He's a cottony coat. I have just recently started keeping him in a puppy cut, not because it is wirey, but because it is cottony, and mats like crazy. I keep his face and ears long. Pet Silk makes a leave in coat oil that really works well on Bernie. Here's the link to Pet Silk. Just look around and you will find the coat oil they make. It's good stuff.
Pet Silk