Step 1: Preheat your oven to 250°F (120°C) and line two large rimmed baking sheets with parchment paper for easy cleanup.
Step 2: In a very large mixing bowl, whisk together the vegetable oil, cayenne pepper, garlic powder, onion powder, lemon pepper, dried dill, and crushed red pepper flakes until the spices are well-dispersed.
Step 3: Add the entire bag of pretzels to the bowl. Use a large spatula or your hands to toss the pretzels thoroughly, ensuring every piece is coated in the hot and spicy pretzel recipe oil mixture. Continue tossing for 3-5 minutes as the pretzels absorb the oil.
Step 4: Spread the pretzels in a single layer across the prepared baking sheets. Place them in the oven and bake for 45 minutes.
Step 5: Every 15 minutes, remove the pans and stir the pretzels to ensure even baking and to prevent the spices from settling or burning.
Step 6: Remove the pretzels from the oven and allow them to cool completely on the baking sheets. They will become crunchier as they cool. Store in an airtight container for up to 3 weeks.