I use several types of brushes and combs to groom my pups. Ruby who is a cotton coat is a bit more challenging. Each of them perform a different job in order to get her coat completely rid of tangles and her mussel free of that gummy stuff. One of my favorite brushes that does an amazing job it a cat brush and the matt removing comb.
You are more than welcome to look at my site for the information on my grooming tools if it would help. There are pics of them at the bottom of the Grooming Tips page. (click on them to enlarge)
Grooming - Dawn's Yorkies Ohio