I have always used the Yorkie Splash and Shine shampoo on Gracie's face with no problem. I just wish she would stop licking it and swallowing it!
It has never bothered her but it just seems weird that she likes the taste of it so much. I give her a bath in the kitchen sink and use this thing I got at PetCo when they were having a 30% off online sale. It is so helpful beclause it has three speeds of spray. I can get her wet and rinsed in no time at all and no worry about left over residue.
Rinse Ace 3-Way Pet Faucet Sprayer at PETCO
I was able to install it myself with a small pipe wrench. It has made bath time such a quick and easy time and she doesn't get cold waiting for me to finish rinsing her anymore.
I have never had an issue using YSSS on Gracie's face. No sting or problems.