tear-free shampoo is not so tear-free

Since she was an infant, we've been using head-to-toe body wash during Emma's bath. The current bottle started to get low, so we bought her Johnson's tear-free shampoo. Ever since we started using it however, bath time has had more tears than we can ever remember. Emma gets very distressed every time we use the new shampoo. When she's not in the tub, she will point out the shampoo bottle and name it and will tell us that we use it to wash her hair. She does not seem bothered by it, but try to use it, and she is not a happy kid! We tell her that it's big girl shampoo and it's just like what Mommy uses in the hopes that she will start to like it and bath time will be tear-free once again!