Why do you groom your dog? Let me guess. You don't want your house to smell like a kennel. You don't want your dog to look "scruffy" ("woolly" is the one I hear). You think your dog is more "comfortable" with a neatly trimmed, clean coat.
Well, speaking for myself, I don't notice the difference. I don't care if I look like a lamb before the shearing season. I don't mind when my coat gets all knotty. Most important, I love smelling like a dog. It's who I am.
So, don't waste your money on high-cost groomers and herbal shampoos. Just be happy that your dog is healthy and friendly and doesn't attack the UPS delivery guy or gal.