New York CNN — Jerome Yankey said he used to pull all-nighters when he was in college – not studying or partying, but scrolling on TikTok until the sun came up. “I saw me not putting the effort into my own life, rather just trying to live vicariously through what I’m seeing,” said 23-year old Yankey. He said he lost sleep, his grades suffered, and he fell out of touch with friends and himself. In 2021, he deleted the app. The positive impact, he said, was obvious. “It’s so great to be able to be sleeping again starting at midnight,”…