Alright, here’s how you half swipe properly. First off, open Snapchat and go to your chat list. Pick the chat you wanna half swipe, but don’t tap it or you’ll completely open it—that’s game over if you’re trying to stay stealthy. Instead, press and hold on the person’s Bitmoji or profile icon (the little avatar or whatever) in the chat list. Then, without lifting your finger, slide it to the right, just enough to peek at the message without fully opening it. You’ll see the message in this preview-like mode.
Now, the key thing is don’t lift your finger until you slide it back to the left! If you lift your finger while it’s still swiped to the right, bam, it’s been opened, and they’ll know you saw their message. Sliding back to the left will leave it unread, and you stay in ghost mode.
And btw, test it on a friend or something just to make sure you’re getting it right. It can be a little glitchy sometimes, and you don’t wanna accidentally expose yourself. Just practice the swipe finesse until you nail it, because it’s all about that muscle memory.