It is ESSENTIAL when frying anything to cook at the proper temp (hence the thermometer), if you're at the right temp, also be sure to place finished fries in the oven at a low temp to maintain texture and heat. Overcrowding hot fries can also lead to steaming, and make them soggy. If your fries are soft, you can quickly re-fry them if your oil is to hot, then be sure to follow the proper procedures to keep them crispy. Enjoy them right away, they won't keep for long.