s8 rear camera sometimes its dirty or darkly

[AC Question]

my s8 sometimes gets a prb. with camers it gets dirty or darkly i clean it but nothing at all when i take it closer to an object it works after restarting it works fine happend 2 times please help

 

[B. Diddy]

Welcome to Android Central! Can you show us some examples? Does that dirty appearance actually show up on the photos, or is it only on the viewfinder?