Chicken crispy

Let the chicken, egg, soy sauce, and cornstarch mixture rest for 5-10 minutes before moving on to the next step.
Make sure your frying oil is at 375 degrees Fahrenheit.
Double fry the chicken. Let the chicken rest for 5 minutes before frying them the second time.
Use a drying rack to cool the chicken. You can use paper towels too, but using a drying rack ensures minimum surface contact, which prevents the chicken crust from becoming soggy.
Make sure the sauce is not too liquid, or it can make the chicken crust soggy.