Egg rolls will turn soggy if they are too crowded during frying. Also, your heat may be too high that it browns the exterior right away without fully cooking the wrappers. Check that your temperature is perfect all throughout frying. Lower the heat when the egg rolls brown too quickly. Lastly, egg rolls may be soggy if they were undercooked. Fry them at the proper temperature of 350 F until they are nicely golden .