You want it to get down into her ears.
when you have it good and frothy, take your thumb and forefinger to massage under/behind her
ears where it bulges a bit before meeting her head. Then rinse, rinse, rinse, inside and outside the ear. Rinse until you no longer see evidence of soap. Yes, her ears will have water in them. Thats okay, as she will just skake it out. Dry her ears as good as you can.