Emmy can go for a while between grooming appointment. I bathe her once a week in the shower with me. I use a variety of doggie shampoos and conditioners, but always use no more tears baby shampoo around her face.
The only problem I was having was right around her little eyes and bottom. She won't wear her hair up, so we have to keep bangs shorter. My daughter, owner of two yorkies, told me to get some little mustache trimmer scissors to trim these areas. It works...I had tried to trim a little before with big scissors but Emmy would not be still. She does not mind the little scissors.