A woman's trick to check if your partner cheated went viral on TikTok. A TikTok user revealed how to use a lint roller to check if your man has cheated. Now, thanks to TikTok user Andrea, you can easily check if your partner’s been unfaithful in about five seconds. Others took a slightly more humorous approach, with someone commenting that “lint roller purchases” must have gone through the roof after this video. Instead of simply denying the allegations, Andrea’s boyfriend instead kicks her out of the room, shutting the door in her face.