Egg rolls often become soggy when they are not prepared or stored properly. Before serving your egg rolls, make sure that you fry them at the right temperature - too low, and they will remain soft; too high, and they will become crunchy and burned.  Additionally, it's essential to store the cooked egg rolls in an airtight container and consume them within a few hours of being cooked, as this helps to keep them crisp.  By understanding how to heat and cool your egg rolls properly, you can enjoy satisfyingly crispy treats every time.