There are a few things to keep in mind: 1) Use thinly sliced chicken breast instead of the thicker slices. Thicker slices will take longer to cook which can potentially release moisture causing the the chicken to become more soggy than crispy. 2) Your chicken isn't completely dry before starting the dredging process. 3) Not shaking off the excess flour. 4) Not gently pressing the panko crumbs into the chicken. 5) Flipping your chicken over too soon.