9. Browser History
One of the first places forms where you can get some sort of evidence is your partner’s browser history. Go check the history right after s/he gets up after spending hours on the PC or laptop. It’s often found that cheating partners are looking for getaways or shopping items for the person they are seeing. You should be looking at these sorts of clues. When you do find something, make a screenshot and then store them in a pen drive and keep device safely.