The camera lens can get easily smudged because it is really close to the fingerprint scanner. Samsung of course is aware of this issue that might became problem to their users, and because they want their users to be happy, they do come with this solution in time. After opening the camera app on either of the Galaxy S8 and S8 Plus, the app itself will remind you to clean the camera lens.
The pop up should say “A clean lens makes for better shots. Clean your camera lens to keep taking better pictures” when you open the camera app. We still don’t know whether it’s going to appear, but probably will pop up randomly after you open it for the first time. But we know for sure that it will not appear every time you open the camera app.
This might seem as a small feature, but definitely is useful one. Now, one question comes to mind, why did Samsung made the fingerprint sensor right next to the camera if they had to add a reminder?