Using Honest 10, most people stop nail biting immediately. To quit the habit for good you need to keep your fingers out of your mouth for a full month. For best results, use the included motivational program to stay consistent and track progress. The more years you’ve been biting the longer it takes to fully break the habit. Keeping the habit away is the real difficulty, so it is best to continue to apply Honest10 daily for one full month, and keep it handy in case of stressful times for another couple months.