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I have been biting my nails and picking my cuticles for a long time now, and need to stop. I was curious to see if there is some sort of product or tool that I can use to smooth out my ragged fingertips. I can't remember the last time I've used anything to maintain them, such as clippers, etc. Am I looking for a regular nail file, or is there something better? One reason I pick at my cuticles is because there is always some thick skin or uneven surface to pick at. What should I get to smooth out the rough, uneven cuticles?