I can tell you that a strawberry pretzel salad can turn soggy due to a few common missteps in the preparation process. One primary reason is inadequate sealing of the creamy layer. If the cool whip and cream cheese mixture doesn't completely cover the salty pretzel crust, the Jell-O can seep through and make the crust soggy. Another potential issue is not allowing each layer to set properly before adding the next. Rushing the process means the Jell-O layer might still be liquid when combined, causing the whole dessert to lose its intended texture. Additionally, excessive moisture from the fresh strawberries can contribute to sogginess; it's important to thoroughly dry the strawberries before adding them to the dessert. By ensuring each layer is correctly prepared and set, you can maintain the perfect balance of textures in your strawberry pretzel salad.