Add strings to a mixing bowl and sprinkle with salt, gently tossing to combine. Place double paper towels on a large baking sheet, spread out strings, and let set for 15 minutes. This will remove some of the excess water.
Preheat oven to 375 degrees.
Return strings to mixing bowl, drizzle with olive oil, and toss to coat. Spread strings evenly over a nonstick or parchment-lined baking sheet. Stir every 10 minutes and continue to bake until crispy, approximately 30 minutes.
Sprinkle parmesan cheese over strings and bake 1-2 more minutes. Discard any strings that are overly brown. Allow to cool at room temperature. Store in an airtight container or ziplock bag.