WalnutHill is a YT member. Here's the link to her website. The shampoo is a bit watery but it still does the trick. Don't let the texture fool you. You will LOVE the smell. If you don't want to spend a lot of money, I see she has prices that start at $2.50. That would be a good way to try it to see if you like it.
Yorkie Splash and Yorkie Shine | Yorkie Shampoo and Yorkie Conditioner