Peeking is another simple trick on Snapchat to open the chat of a person without knowing him. You can use this trick to read messages of a person and view his snaps on Snapchat. But sometimes this trick does not work. You can follow these steps for applying the peeking method to open Snaps of a person.
Open your Snapchat application and come on the chat page and open the person’s chat; by putting your finger on the avatar.
Tap on the chat carefully and swipe it on the screen towards the right to avoid sending a notification to the person.